Authors’ contributions
MH, HC, HT
Conception and design: YL1, AZ, SG and JH. Administrative support: YL1, AZ and SG. Patient enrolment: YL1, SL, MH, KC, ZT, YL2, JQ, ZW, HC and HT. Collection and assembly of data: YY, WQ, LX, SH, SW and GB. Data analysis and interpretation: ZY, HH, YF, BL and XD. Manuscript writing and revision: YL1, AZ, FB, WQ, BZ and SG. All the authors read and approved the final manuscript.