- Correspondence to Dr Shumei Song, Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; ; Dr Jaffer A Ajani, Department of Gastrointestinal Medical Oncology, Unit 426, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Bouulevard, Houston, TX, USA, 77030-4009;
- Received July 28, 2020
- Revised February 20, 2021
- Accepted March 2, 2021
- First published March 30, 2021.
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