- Correspondence to Dr Li Li, General Practice, Guangzhou First People's Hospital, Guangzhou, Guangdong, China; ; Professor Ying Li, Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China;
- Received February 24, 2020
- Accepted February 26, 2020
- First published March 11, 2020.
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