- Correspondence to Dr Mark R Fox, Laboratory and Clinic for Disorders of Gastrointestinal Motility and Function, Center for Integrative Gastroenterology, Klinik Arlesheim, Arlesheim 4144, Switzerland;
- Received May 7, 2019
- Revised June 15, 2019
- Accepted June 21, 2019
- First published August 19, 2019.
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