- Correspondence to Dr Wei Zheng, Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN 37232-2102, USA;
- Received September 26, 2019
- Revised March 18, 2020
- Accepted April 6, 2020
- First published June 16, 2020.
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