A symptom severity questionnaire for patients suffering from functional gastrointestinal disorder: FGI-Checklist.
Yawen ChanPui Kuan CheongFanny Fan FangCynthia K Y CheungLin Lin LanKay Wing Ki YuenJessica Yuet Ling ChingArthur Dun Ping MakJustin Che-Yuen WuPublished in: Journal of gastroenterology and hepatology (2019)
The instrument, Checklist, is valid and reliable.