An incidence can be constituted-of-or-filled-with gastrointestinal complaints.
Causes can be constituted-of-or-filled-with gastrointestinal disease.
A small intestine can be a part of a gastrointestinal tract.
Glutathione may be absorbed across a gastrointestinal tract.
A case can be constituted-of-or-filled-with gastrointestinal anthrax.