title: Serum caffeine levels in hospitalized patients.
mesh_terms: D000328:Adult; D000368:Aged; D002110:Caffeine / Q000097:blood*; D006801:Humans; D007297:Inpatients; D008297:Male; D008875:Middle Aged; D010361:Patients; D013805:Theobromine / Q000097:blood
chemical_list: D002110:Caffeine; D013805:Theobromine