- Correspondence to Dr Fabian Proft, Department of Gastroenterology, Infectiology and Rheumatology, Charite Universitatsmedizin Berlin Campus Benjamin Franklin, 12203 Berlin, Germany;
- Received May 6, 2020
- Revised May 12, 2020
- Accepted May 13, 2020
- First published June 24, 2020.
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