| GITT | gastrointestinal transit time; glucose insulin tolerance test |
|---|---|
| GTB | gastrointestinal tract bleeding |
| LGI | large glucagon immunoreactivity; low gastrointestinal |
| MNGIE | myo-, neuro-, gastrointestinal encephalopathy |
| SLUDGE | salivation, lacrimation, urination, defecation, gastrointestinal upset, emesis |