Retropharyngeal Abscess
Emedicine.medscape.com Jan, Kahn, J.H. & Shlamovitz, G.Z., 2017
Parkinsonism-Recognition and Differential Diagnosis
BMJ 310:447-452, Quinn,N., 1995
Granulomatous Inflammation of Mouth & Larynx, Consistent with Crohn's Disease, Case 35-1978
NEJM 299:538-544, Scully,R.E.,et al, 1978