Skip Navigation

JNCI Journal of the National Cancer Institute 2005 97(16):1185-1194; doi:10.1093/jnci/dji238
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (108)
Right arrow Request Permissions
Google Scholar
Right arrow Articles by Mukohara, T.
Right arrow Articles by Jänne, P. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mukohara, T.
Right arrow Articles by Jänne, P. A.
Related Collections
Right arrowEditorial about this Article
Social Bookmarking
 Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 2005 Oxford University Press

ARTICLE

Differential Effects of Gefitinib and Cetuximab on Non–small-cell Lung Cancers Bearing Epidermal Growth Factor Receptor Mutations

Toru Mukohara, Jeffrey A. Engelman, Nasser H. Hanna, Beow Y. Yeap, Susumu Kobayashi, Neal Lindeman, Balázs Halmos, Joseph Pearlberg, Zenta Tsuchihashi, Lewis C. Cantley, Daniel G. Tenen, Bruce E. Johnson, Pasi A. Jänne

Affiliations of authors: Lowe Center for Thoracic Oncology (TM, BEJ, PAJ) and Department of Medical Oncology (TM, JAE, JP, BEJ, PAJ), Dana-Farber Cancer Institute, Boston, MA; Department of Medicine, Brigham and Women's Hospital, Boston, MA (TM, JAE, BEJ, PAJ); Massachusetts General Hospital, Boston, MA (BYY); Harvard Medical School, Boston, MA (TM, JAE, BYY, BEJ, PAJ); Department of Systems Biology, Harvard Medical School, and Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA (JAE, LCC); Department of Medicine, Indiana University, Indianapolis, IN (NHH); Biostatistics Center, Massachusetts General Hospital, Boston, MA (BYY); Division of Hematology/Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA (SK, BH, DGT); Department of Pathology, Brigham and Women's Hospital, Boston, MA (NL); Ireland Cancer Center, University Hospitals of Cleveland, Case School of Medicine, Cleveland, OH (BH); Pharmaceutical Research Institute, Bristol-Myers Squibb, Princeton, NJ (ZT)

Correspondence to: Pasi A. Jänne, MD, PhD, Lowe Center for Thoracic Oncology, Dana-Farber Cancer Institute, D1234, 44 Binney St., Boston, MA 02115 (e-mail: pjanne{at}partners.org).

Background: Many patients with non–small-cell lung cancer (NSCLC) who achieve radiographic responses to treatment with the epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors gefitinib and erlotinib have somatic mutations in the EGFR tyrosine kinase domain. However, little is known about the efficacy of cetuximab, an antibody against the EGFR extracellular domain, in EGFR mutant NSCLC. Methods: NSCLC cell lines carrying wild-type EGFR (A549, H441, and H1666) or mutant EGFR (H3255, DFCILU-011, PC-9, and HCC827) were treated with various dilutions of gefitinib or cetuximab relative to maximal achievable serum concentration. Cell growth was analyzed by the MTS assay, with differences between dose–response curves analyzed nonparametrically. Apoptosis was analyzed by propidium iodide staining and immunoblotting for PARP. Phosphorylation of EGFR and the downstream signaling components ERK1/2 and Akt were analyzed by immunoblotting. Statistical tests were two-sided. Results: Growth of NSCLC lines with wild-type EGFR was slightly (A549 and H441) or moderately (H1666) inhibited by gefitinib and cetuximab, and the effects of the two agents were similar. Both agents also induced no (H441) or moderate (H1666) apoptosis in NSCLC cells with wild-type EGFR. By contrast, gefitinib was statistically significantly more effective than cetuximab at inhibiting growth of EGFR mutant cells (H3255: P = .003, DFCILU-011: P = .011, and PC-9: P = .003), and gefitinib-treated EGFR mutant cells had higher levels of apoptosis than cetuximab-treated cells (mean fold increase in apoptosis by 1 µM of gefitinib and 10 µg/mL of cetuximab relative to control, H3255: 8.3 [95% confidence interval {CI} = 4.8 to 11.8] and 2.1 [95% CI = 2.0 to 2.2], respectively, P = .025; DFCILU-011: 5.7 [95% CI = 5.1 to 6.3] and. 0.9 [95% CI = 0.3 to 1.5], respectively, P<.001). Gefitinib treatment decreased EGFR, ERK1/2, and Akt phosphorylation in EGFR mutant cell lines whereas cetuximab had relatively little effect. Both gefitinib and cetuximab inhibited the growth of HCC827 cells, but gefitinib inhibited growth to a greater extent (P = .003). Conclusions: EGFR mutations in NSCLC cells are associated with sensitivity to gefitinib but not to cetuximab.



Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?

Editorial about this Article

Gefitinib Versus Cetuximab in Lung Cancer: Round One
John D. Minna, Michael J. Peyton, and Adi F. Gazdar
J Natl Cancer Inst 2005 97: 1168-1169. [Extract] [Full Text] [PDF]



This article has been cited by other articles:


Home page
Cancer Res.Home page
L. M. Sholl, B. Y. Yeap, A. J. Iafrate, A. J. Holmes-Tisch, Y.-P. Chou, M.-T. Wu, Y.-G. Goan, L. Su, E. Benedettini, J. Yu, et al.
Lung Adenocarcinoma with EGFR Amplification Has Distinct Clinicopathologic and Molecular Features in Never-Smokers
Cancer Res., November 1, 2009; 69(21): 8341 - 8348.
[Abstract] [Full Text] [PDF]


Home page
Molecular Cancer TherapeuticsHome page
D. J. Freeman, T. Bush, S. Ogbagabriel, B. Belmontes, T. Juan, C. Plewa, G. Van, C. Johnson, and R. Radinsky
Activity of panitumumab alone or with chemotherapy in non-small cell lung carcinoma cell lines expressing mutant epidermal growth factor receptor
Mol. Cancer Ther., June 1, 2009; 8(6): 1536 - 1546.
[Abstract] [Full Text] [PDF]


Home page
The OncologistHome page
C. Gridelli, P. Maione, M. L. Ferrara, and A. Rossi
Cetuximab and Other Anti-Epidermal Growth Factor Receptor Monoclonal Antibodies in the Treatment of Non-Small Cell Lung Cancer
Oncologist, June 1, 2009; 14(6): 601 - 611.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
G. N. Naumov, M. B. Nilsson, T. Cascone, A. Briggs, O. Straume, L. A. Akslen, E. Lifshits, L. A. Byers, L. Xu, H.-k. Wu, et al.
Combined Vascular Endothelial Growth Factor Receptor and Epidermal Growth Factor Receptor (EGFR) Blockade Inhibits Tumor Growth in Xenograft Models of EGFR Inhibitor Resistance
Clin. Cancer Res., May 15, 2009; 15(10): 3484 - 3494.
[Abstract] [Full Text] [PDF]


Home page
Anticancer ResHome page
K. KATAYAMA, K. SHIBATA, J. MITSUHASHI, K. NOGUCHI, and Y. SUGIMOTO
Pharmacological Interplay between Breast Cancer Resistance Protein and Gefitinib in Epidermal Growth Factor Receptor Signaling
Anticancer Res, April 1, 2009; 29(4): 1059 - 1065.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
F. G. Pernas, C. T. Allen, M. E. Winters, B. Yan, J. Friedman, B. Dabir, K. Saigal, G. S. Mundinger, X. Xu, J. C. Morris, et al.
Proteomic Signatures of Epidermal Growth Factor Receptor and Survival Signal Pathways Correspond to Gefitinib Sensitivity in Head and Neck Cancer
Clin. Cancer Res., April 1, 2009; 15(7): 2361 - 2372.
[Abstract] [Full Text] [PDF]


Home page
Molecular Cancer TherapeuticsHome page
M. M. Schittenhelm, C. Kollmannsberger, K. Oechsle, A. Harlow, J. Morich, F. Honecker, R. Kurek, S. Storkel, L. Kanz, C. L. Corless, et al.
Molecular determinants of response to matuzumab in combination with paclitaxel for patients with advanced non-small cell lung cancer
Mol. Cancer Ther., March 1, 2009; 8(3): 481 - 489.
[Abstract] [Full Text] [PDF]


Home page
Cancer Res.Home page
A. A. Memon, S. Jakobsen, F. Dagnaes-Hansen, B. S. Sorensen, S. Keiding, and E. Nexo
Positron Emission Tomography (PET) Imaging with [11C]-Labeled Erlotinib: A Micro-PET Study on Mice with Lung Tumor Xenografts
Cancer Res., February 1, 2009; 69(3): 873 - 878.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
T. Okabe, I. Okamoto, S. Tsukioka, J. Uchida, E. Hatashita, Y. Yamada, T. Yoshida, K. Nishio, M. Fukuoka, P. A. Janne, et al.
Addition of S-1 to the Epidermal Growth Factor Receptor Inhibitor Gefitinib Overcomes Gefitinib Resistance in Non-small cell Lung Cancer Cell Lines with MET Amplification
Clin. Cancer Res., February 1, 2009; 15(3): 907 - 913.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
K. Yonesaka, K. Zejnullahu, N. Lindeman, A. J. Homes, D. M. Jackman, F. Zhao, A. M. Rogers, B. E. Johnson, and P. A. Janne
Autocrine Production of Amphiregulin Predicts Sensitivity to Both Gefitinib and Cetuximab in EGFR Wild-type Cancers
Clin. Cancer Res., November 1, 2008; 14(21): 6963 - 6973.
[Abstract] [Full Text] [PDF]


Home page
JCOHome page
F. R. Hirsch, R. S. Herbst, C. Olsen, K. Chansky, J. Crowley, K. Kelly, W. A. Franklin, P. A. Bunn Jr, M. Varella-Garcia, and D. R. Gandara
Increased EGFR Gene Copy Number Detected by Fluorescent In Situ Hybridization Predicts Outcome in Non-Small-Cell Lung Cancer Patients Treated With Cetuximab and Chemotherapy
J. Clin. Oncol., July 10, 2008; 26(20): 3351 - 3357.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
J. P. Koivunen, C. Mermel, K. Zejnullahu, C. Murphy, E. Lifshits, A. J. Holmes, H. G. Choi, J. Kim, D. Chiang, R. Thomas, et al.
EML4-ALK Fusion Gene and Efficacy of an ALK Kinase Inhibitor in Lung Cancer
Clin. Cancer Res., July 1, 2008; 14(13): 4275 - 4283.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
J. A. Engelman and P. A. Janne
Mechanisms of Acquired Resistance to Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitors in Non-Small Cell Lung Cancer
Clin. Cancer Res., May 15, 2008; 14(10): 2895 - 2899.
[Abstract] [Full Text] [PDF]


Home page
Ann OncolHome page
F. Cappuzzo, G. Finocchiaro, E. Rossi, P.A. Janne, C. Carnaghi, C. Calandri, K. Bencardino, C. Ligorio, F. Ciardiello, T. Pressiani, et al.
EGFR FISH assay predicts for response to cetuximab in chemotherapy refractory colorectal cancer patients
Ann. Onc., April 1, 2008; 19(4): 717 - 723.
[Abstract] [Full Text] [PDF]


Home page
J. Immunol.Home page
M. Peipp, T. Schneider-Merck, M. Dechant, T. Beyer, J. J. Lammerts van Bueren, W. K. Bleeker, P. W. H. I. Parren, J. G. J. van de Winkel, and T. Valerius
Tumor Cell Killing Mechanisms of Epidermal Growth Factor Receptor (EGFR) Antibodies Are Not Affected by Lung Cancer-Associated EGFR Kinase Mutations
J. Immunol., March 15, 2008; 180(6): 4338 - 4345.
[Abstract] [Full Text] [PDF]


Home page
NEJMHome page
F. Ciardiello and G. Tortora
EGFR Antagonists in Cancer Treatment
N. Engl. J. Med., March 13, 2008; 358(11): 1160 - 1174.
[Full Text] [PDF]


Home page
Molecular Cancer TherapeuticsHome page
H.-P. Kim, S.-W. Han, S.-H. Kim, S.-A. Im, D.-Y. Oh, Y.-J. Bang, and T.-Y. Kim
Combined lapatinib and cetuximab enhance cytotoxicity against gefitinib-resistant lung cancer cells
Mol. Cancer Ther., March 1, 2008; 7(3): 607 - 615.
[Abstract] [Full Text] [PDF]


Home page
Ann OncolHome page
R. Rosell, G. Robinet, A. Szczesna, R. Ramlau, M. Constenla, B. C. Mennecier, W. Pfeifer, K. J. O'Byrne, T. Welte, R. Kolb, et al.
Randomized phase II study of cetuximab plus cisplatin/vinorelbine compared with cisplatin/vinorelbine alone as first-line therapy in EGFR-expressing advanced non-small-cell lung cancer
Ann. Onc., February 1, 2008; 19(2): 362 - 369.
[Abstract] [Full Text] [PDF]


Home page
Cancer Res.Home page
J. A. Engelman, K. Zejnullahu, C.-M. Gale, E. Lifshits, A. J. Gonzales, T. Shimamura, F. Zhao, P. W. Vincent, G. N. Naumov, J. E. Bradner, et al.
PF00299804, an Irreversible Pan-ERBB Inhibitor, Is Effective in Lung Cancer Models with EGFR and ERBB2 Mutations that Are Resistant to Gefitinib
Cancer Res., December 15, 2007; 67(24): 11924 - 11932.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
W. Liu, X. Wu, W. Zhang, R. C. Montenegro, D. L. Fackenthal, J. A. Spitz, L. M. Huff, F. Innocenti, S. Das, E. H. Cook, Jr., et al.
Relationship of EGFR Mutations, Expression, Amplification, and Polymorphisms to Epidermal Growth Factor Receptor Inhibitors in the NCI60 Cell Lines
Clin. Cancer Res., November 15, 2007; 13(22): 6788 - 6795.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
J. M. Roda, T. Joshi, J. P. Butchar, J. W. McAlees, A. Lehman, S. Tridandapani, and W. E. Carson III
The Activation of Natural Killer Cell Effector Functions by Cetuximab-Coated, Epidermal Growth Factor Receptor Positive Tumor Cells is Enhanced By Cytokines
Clin. Cancer Res., November 1, 2007; 13(21): 6419 - 6428.
[Abstract] [Full Text] [PDF]


Home page
Molecular Cancer TherapeuticsHome page
J. F. Doody, Y. Wang, S. N. Patel, C. Joynes, S. P. Lee, J. Gerlak, R. L. Rolser, Y. Li, P. Steiner, R. Bassi, et al.
Inhibitory activity of cetuximab on epidermal growth factor receptor mutations in non small cell lung cancers
Mol. Cancer Ther., October 1, 2007; 6(10): 2642 - 2651.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
D. Morgensztern and R. Govindan
Is There a Role for Cetuximab in Non Small Cell Lung Cancer?
Clin. Cancer Res., August 1, 2007; 13(15): 4602s - 4605s.
[Abstract] [Full Text] [PDF]


Home page
Ann OncolHome page
I Chau, D Cunningham, T Hickish, A Massey, L Higgins, R Osborne, N Botwood, and A Swaisland
Gefitinib and irinotecan in patients with fluoropyrimidine-refractory, irinotecan-naive advanced colorectal cancer: a phase I-II study
Ann. Onc., April 1, 2007; 18(4): 730 - 737.
[Abstract] [Full Text] [PDF]


Home page
Cancer Res.Home page
T. Okabe, I. Okamoto, K. Tamura, M. Terashima, T. Yoshida, T. Satoh, M. Takada, M. Fukuoka, and K. Nakagawa
Differential Constitutive Activation of the Epidermal Growth Factor Receptor in Non-Small Cell Lung Cancer Cells Bearing EGFR Gene Mutation and Amplification
Cancer Res., March 1, 2007; 67(5): 2046 - 2053.
[Abstract] [Full Text] [PDF]


Home page
J. Biol. Chem.Home page
M. Perez-Torres, M. Guix, A. Gonzalez, and C. L. Arteaga
Epidermal Growth Factor Receptor (EGFR) Antibody Down-regulates Mutant Receptors and Inhibits Tumors Expressing EGFR Mutations
J. Biol. Chem., December 29, 2006; 281(52): 40183 - 40192.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
R. Rosell, M. Taron, N. Reguart, D. Isla, and T. Moran
Epidermal Growth Factor Receptor Activation: How Exon 19 and 21 Mutations Changed Our Understanding of the Pathway
Clin. Cancer Res., December 15, 2006; 12(24): 7222 - 7231.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
G. J. Riely, K. A. Politi, V. A. Miller, and W. Pao
Update on Epidermal Growth Factor Receptor Mutations in Non-Small Cell Lung Cancer
Clin. Cancer Res., December 15, 2006; 12(24): 7232 - 7241.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
M. Ono and M. Kuwano
Molecular Mechanisms of Epidermal Growth Factor Receptor (EGFR) Activation and Response to Gefitinib and Other EGFR-Targeting Drugs
Clin. Cancer Res., December 15, 2006; 12(24): 7242 - 7251.
[Abstract] [Full Text] [PDF]


Home page
Cancer Res.Home page
S. Kobayashi, T. Shimamura, S. Monti, U. Steidl, C. J. Hetherington, A. M. Lowell, T. Golub, M. Meyerson, D. G. Tenen, G. I. Shapiro, et al.
Transcriptional Profiling Identifies Cyclin D1 as a Critical Downstream Effector of Mutant Epidermal Growth Factor Receptor Signaling
Cancer Res., December 1, 2006; 66(23): 11389 - 11398.
[Abstract] [Full Text] [PDF]


Home page
JCOHome page
N. Hanna, R. Lilenbaum, R. Ansari, T. Lynch, R. Govindan, P. A. Janne, and P. Bonomi
Phase II Trial of Cetuximab in Patients With Previously Treated Non Small-Cell Lung Cancer
J. Clin. Oncol., November 20, 2006; 24(33): 5253 - 5258.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
G. Giaccone, M. Gallegos Ruiz, T. Le Chevalier, N. Thatcher, E. Smit, J. A. Rodriguez, P. Janne, D. Oulid-Aissa, and J.-C. Soria
Erlotinib for Frontline Treatment of Advanced Non-Small Cell Lung Cancer: a Phase II Study.
Clin. Cancer Res., October 15, 2006; 12(20): 6049 - 6055.
[Abstract] [Full Text] [PDF]


Home page
Clin. Chem.Home page
G. Amicarelli, D. Adlerstein, E. Shehi, F. Wang, and G. M. Makrigiorgos
Genotype-Specific Signal Generation Based on Digestion of 3-Way DNA Junctions: Application to KRAS Variation Detection
Clin. Chem., October 1, 2006; 52(10): 1855 - 1863.
[Abstract] [Full Text] [PDF]


Home page
JCOHome page
D. M. Jackman, A. J. Holmes, N. Lindeman, P. Y. Wen, S. Kesari, A. M. Borras, C. Bailey, F. de Jong, P. A. Janne, and B. E. Johnson
Response and Resistance in a Non-Small-Cell Lung Cancer Patient With an Epidermal Growth Factor Receptor Mutation and Leptomeningeal Metastases Treated With High-Dose Gefitinib
J. Clin. Oncol., September 20, 2006; 24(27): 4517 - 4520.
[Full Text] [PDF]


Home page
Cancer Res.Home page
M. P. Cunningham, H. Thomas, Z. Fan, and H. Modjtahedi
Responses of Human Colorectal Tumor Cells to Treatment with the Anti-Epidermal Growth Factor Receptor Monoclonal Antibody ICR62 Used Alone and in Combination with the EGFR Tyrosine Kinase Inhibitor Gefitinib.
Cancer Res., August 1, 2006; 66(15): 7708 - 7715.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
R. C. Lilenbaum
The evolving role of cetuximab in non-small cell lung cancer.
Clin. Cancer Res., July 15, 2006; 12(14): 4432s - 4435s.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
D. M. Jackman, B. Y. Yeap, L. V. Sequist, N. Lindeman, A. J. Holmes, V. A. Joshi, D. W. Bell, M. S. Huberman, B. Halmos, M. S. Rabin, et al.
Exon 19 Deletion Mutations of Epidermal Growth Factor Receptor Are Associated with Prolonged Survival in Non-Small Cell Lung Cancer Patients Treated with Gefitinib or Erlotinib.
Clin. Cancer Res., July 1, 2006; 12(13): 3908 - 3914.
[Abstract] [Full Text] [PDF]


Home page
Clin. Cancer Res.Home page
K. Erjala, M. Sundvall, T. T. Junttila, N. Zhang, M. Savisalo, P. Mali, J. Kulmala, J. Pulkkinen, R. Grenman, and K. Elenius
Signaling via ErbB2 and ErbB3 Associates with Resistance and Epidermal Growth Factor Receptor (EGFR) Amplification with Sensitivity to EGFR Inhibitor Gefitinib in Head and Neck Squamous Cell Carcinoma Cells.
Clin. Cancer Res., July 1, 2006; 12(13): 4103 - 4111.
[Abstract] [Full Text] [PDF]


Home page
The OncologistHome page
S. Ramalingam and A. B. Sandler
Salvage therapy for advanced non-small cell lung cancer: factors influencing treatment selection.
Oncologist, June 1, 2006; 11(6): 655 - 665.
[Abstract] [Full Text] [PDF]


Home page
Molecular Cancer TherapeuticsHome page
R. Wild, K. Fager, C. Flefleh, D. Kan, I. Inigo, S. Castaneda, F. Luo, A. Camuso, K. McGlinchey, and W. C. Rose
Cetuximab preclinical antitumor activity (monotherapy and combination based) is not predicted by relative total or activated epidermal growth factor receptor tumor expression levels
Mol. Cancer Ther., January 1, 2006; 5(1): 104 - 113.
[Abstract] [Full Text] [PDF]


Home page
JCOHome page
F. R. Hirsch and P. A. Bunn Jr
Epidermal Growth Factor Receptor Inhibitors in Lung Cancer: Smaller or Larger Molecules, Selected or Unselected Populations?
J. Clin. Oncol., December 20, 2005; 23(36): 9044 - 9047.
[Full Text] [PDF]


Home page
JNCI J Natl Cancer InstHome page
J. D. Minna, M. J. Peyton, and A. F. Gazdar
Gefitinib Versus Cetuximab in Lung Cancer: Round One
J Natl Cancer Inst, August 17, 2005; 97(16): 1168 - 1169.
[Full Text] [PDF]



Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.