Lapatinib Combined With Letrozole Versus Letrozole and Placebo As First-Line Therapy for Postmenopausal Hormone Receptor–Positive Metastatic Breast Cancer

Stephen Johnston, John Pippen, Xavier Pivot, Mikhail Lichinitser, Saeed Sadeghi, Veronique Dieras, Henry Leonidas Gomez, Gilles Romieu, Alexey Manikhas, M. John Kennedy, Michael F. Press, Julie Maltzman, Allison Florance, Lisa O'Rourke, Cristina Oliva, Steven Stein, Mark Pegram

Open source

DOI: 10.1200/jco.2009.23.3734
Published: 2009-11-20
Container: Journal of Clinical Oncology
Publisher: American Society of Clinical Oncology (ASCO)
Open access: unknown

Credibility signals

uncertain Score 64/100 under policy 1.0.0. This is a metadata assessment, not a judgment of the paper's conclusions.

Show all credibility signals

supportingDOI registered: A matching record was returned by Crossref. Source: Crossref; license: CC0 metadata
supportingDOI resolves: A matching record was returned by Crossref. Source: Crossref; license: CC0 metadata
not scoredDirectory of Open Access Journals: No matching DOAJ record was present in this response. No allow-list match; this is not evidence of low credibility. Source: DOAJ; license: CC0
not scoredMEDLINE indexed: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredOpenAlex core source: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredKnown publisher allow-list: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredROR affiliation: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredRetraction Watch retraction: No retraction notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch expression of concern: No expression of concern notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch correction: No correction notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch reinstatement: No reinstatement notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredOpen access status: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredPublication license: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredPublication version: A publication version was supplied but is not scored. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer
supportingMetadata completeness: All 6 scored descriptive metadata groups are present. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer

Cite this work

BibTeX

@article{allodium:10.1200/jco.2009.23.3734,
  title = {Lapatinib Combined With Letrozole Versus Letrozole and Placebo As First-Line Therapy for Postmenopausal Hormone Receptor–Positive Metastatic Breast Cancer},
  author = {Stephen Johnston and John Pippen and Xavier Pivot and Mikhail Lichinitser and Saeed Sadeghi and Veronique Dieras and Henry Leonidas Gomez and Gilles Romieu and Alexey Manikhas and M. John Kennedy and Michael F. Press and Julie Maltzman and Allison Florance and Lisa O'Rourke and Cristina Oliva and Steven Stein and Mark Pegram},
  year = {2009},
  journal = {Journal of Clinical Oncology},
  doi = {10.1200/jco.2009.23.3734},
  url = {https://doi.org/10.1200/jco.2009.23.3734}
}

RIS

TY  - JOUR
TI  - Lapatinib Combined With Letrozole Versus Letrozole and Placebo As First-Line Therapy for Postmenopausal Hormone Receptor–Positive Metastatic Breast Cancer
AU  - Stephen Johnston
AU  - John Pippen
AU  - Xavier Pivot
AU  - Mikhail Lichinitser
AU  - Saeed Sadeghi
AU  - Veronique Dieras
AU  - Henry Leonidas Gomez
AU  - Gilles Romieu
AU  - Alexey Manikhas
AU  - M. John Kennedy
AU  - Michael F. Press
AU  - Julie Maltzman
AU  - Allison Florance
AU  - Lisa O'Rourke
AU  - Cristina Oliva
AU  - Steven Stein
AU  - Mark Pegram
PY  - 2009
JO  - Journal of Clinical Oncology
DO  - 10.1200/jco.2009.23.3734
UR  - https://doi.org/10.1200/jco.2009.23.3734
ER  -

APA

Johnston, S., Pippen, J., Pivot, X., Lichinitser, M., Sadeghi, S., Dieras, V., Gomez, H. L., Romieu, G., Manikhas, A., Kennedy, M. J., Press, M. F., Maltzman, J., Florance, A., O'Rourke, L., Oliva, C., Stein, S., & Pegram, M. (2009). Lapatinib Combined With Letrozole Versus Letrozole and Placebo As First-Line Therapy for Postmenopausal Hormone Receptor–Positive Metastatic Breast Cancer. Journal of Clinical Oncology. https://doi.org/10.1200/jco.2009.23.3734

Source records

crossref · retrieved 2026-11-10T10:37:40.780Z