PubMed:: "Gastrointestinal Motility"[Mesh] OR "Gastroparesis"[Mesh] OR gastrointestinal motilit*[tiab] OR intestinal motilit*[tiab] OR gastric emptying[tiab] OR gastrointestinal transit*[tiab] OR intestinal transit*[tiab] OR stomach motilit*[tiab] OR gastric motor function*[tiab] OR gastropares*[tiab] OR gastric stasis[tiab];; Embase.com:: 'gastrointestinal motility'/exp OR 'stomach paresis'/exp OR (gastrointestinal NEXT/1 motilit*):ab,ti OR (intestinal NEXT/1 motilit*):ab,ti OR 'gastric emptying':ab,ti OR (gastrointestinal NEXT/1 transit*):ab,ti OR (intestinal NEXT/1 transit*):ab,ti OR (stomach NEXT/1 motilit*):ab,ti OR (gastric NEXT/1 motor function*):ab,ti OR gastropares*:ab,ti OR 'gastric stasis':ab,ti