Retropharyngeal Abscess
Emedicine.medscape.com Jan, Kahn, J.H. & Shlamovitz, G.Z., 2017
Fungal Infections Associated with Contaminated Methylprednisolone Injections - Preliminary Report
NEJM 368:2495-2509, Kauffman, C.,et al, 2013
Multiple Ring-Enhancing Lesions of the Brain
J Postgrad Med 56:307-316, Garg, R.K. & Sinha, M.K., 2010