Published on in Vol 21, No 3 (2019): March
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/11761, first published
.
1 Department of Pediatric Gastroenterology, Hepatology and Nutrition, University of Groningen, University Medical Centre Groningen, Groningen, Netherlands
2 Department of General Practice, University of Groningen, University Medical Centre Groningen, Groningen, Netherlands