- Correspondence to Dr Niels Teich, Internistische Gemeinschaftspraxis für Verdauungs-und Stoffwechselkrankheiten, Nordstr. 21, Leipzig D-04105, Germany;
- Received September 29, 2016
- Revised October 24, 2016
- Accepted October 25, 2016
- First published November 14, 2016.
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