Chronic or recurrent infections
Immunodeficiency
Endocrine disorder
Cancer
Chronic lung disease
Chronic renal insufficiency
Heart<unk> 
Hepatic<unk> 
Chronic wounds
Hip or other large bone fracture
Inflammatory bowel disease
Malabsorption or malnutrition
Rheumatologic diseases (e.g. RA, SLE
Stroke
Depression
Dementia
Psychosis
Medication side effects or interactions
Anticholinergics, antiepileptics, benzodiazepines, beta blockers, central alpha antagonists, diuretics, steroids, neuroleptics, opioids, SSRIs, and TCAs are common culprits
Anticholinergics, antiepileptics, benzodiazepines, beta blockers, central alpha antagonists, diuretics, steroids, neuroleptics, opioids, SSRIs, and TCAs are common culprits
Failure to thrive
Chronic or recurrent infections
Stridor 
Immunodeficiency
Stridor
Endocrine disorder
Hiccups
Cancer