Competing interests
S.L. has received research support from Astra Zeneca, Hutchison, BMS, Heng Rui, Beigene and Roche, Hansoh, Lilly Suzhou Pharmaceutical Co. Ltd; has received speaker fees from Astra Zeneca, Roche, Hansoh, Hengrui Therapeutics; and is an advisor and consultant of Astra Zeneca, Pfizer, Boehringer Ingelheim, Hutchison MediPharma, ZaiLab, GenomiCare, Yuhan Corporation, Menarini, InventisBio Co. Ltd., Shanghai Fosun Pharmaceutical (Group) Co., Ltd., Simcere Zaiming Pharmaceutical Co., Ltd. and Roche. T.W. and J.Z. are employees of Chia Tai Tianqing Pharmaceutical Group Co., Ltd. All the other authors declare no competing interests.