This study was funded from Gilead Science Japan. S Tsutsué and H Asou are employees of Gilead Science Japan. S Makita receives honoraria from: Abbvie, AstraZeneca, BMS, Gilead Sciences, Genmab Chugai, CSL Behring, Daiichi-Sankyo, Eisai, Novartis, SymBio and Takeda outside of this work. H Matsuda, R Yamamura and TD Taylor are employees of IQVIA Solutions Japan. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.