title: PD-L1 Testing in Cancer: Challenges in Companion Diagnostic Development.
authors.affiliation: Princess Margaret Cancer Centre, Drug Development Program Toronto, Ontario, Canada.
authors.forename: Aaron R
authors.initials: AR
authors.lastname: Hansen
authors.affiliation: Princess Margaret Cancer Centre, Drug Development Program Toronto, Ontario, Canada.
authors.forename: Lillian L
authors.initials: LL
authors.lastname: Siu
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D060890:B7-H1 Antigen / Q000037:antagonists & inhibitors* / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000037:antagonists & inhibitors* / Q000378:metabolism; D006801:Humans; D058990:Molecular Targeted Therapy; D009369:Neoplasms / Q000175:diagnosis / Q000188:drug therapy* / Q000378:metabolism; D018579:Patient Selection; D011237:Predictive Value of Tests; D015398:Signal Transduction / Q000187:drug effects; D016896:Treatment Outcome
chemical_list: D000970:Antineoplastic Agents; D060890:B7-H1 Antigen; D014408:Biomarkers, Tumor; C423236:CD274 protein, human