Braal, C Louwrens Relevance of Endoxifen Concentrations: Absence of Evidence Is Not Evidence of Absence. [electronic resource] - Journal of clinical oncology : official journal of the American Society of Clinical Oncology 08 2019 - 1980-1981 p. digital Publication Type: Letter; Comment ISSN: 1527-7755 Standard No.: 10.1200/JCO.19.00418 doi Subjects--Topical Terms: Antineoplastic Agents, HormonalHumansPharmacogeneticsProspective StudiesTamoxifen--analogs & derivatives