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Authors
Gao, Qiufeng
Liu, Meili
Peng, Lanxi
Zhang, Yang
Shi, Yaojiang
Teuwen, Dirk E.
Yi, Hongmei
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Article History
Received: 14 December 2021
Accepted: 18 July 2022
First Online: 26 July 2022
Declarations
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: All methods were performed in accordance with the Declaration of Helsinki. The study procedures were reviewed and approved by the institutional review boards of Peking University (IRB00001052–17033) and Sichuan University (protocol number K2015025), China. The boards approved the verbal consent procedure. Informed consent from all participants was obtained through direct communications with them .
: Not applicable.
: UCB provided support in the form of a salary for author DET; now retired. But UCB did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. This does not alter our adherence to BMC Health Services Research policies on sharing data and materials. The authors declare no conflict of interest. There are no patents, products in development or marketed products to declare.
