Funding
This subgroup analysis was funded by the projects of Shanghai Science and Technology Commission (201409003900,124119a8900); Project of Shanghai Health and Family Planning Commission (201640094 ); SanHang Program of the Naval Military Medical University; “Climbing” program of Changhai hospital (2019YXK034); National Health Commission of the People’s Republic of China (GN-2017R0001); Shanghai Key Clinical Specialty (shslczdzk06101). The design and data collection were performed by members of the executive committee and the local investigators of each participating center. The steering committee had the final responsibility for the decision to submit the article for publication.