Article by Amy Kunihiro, MD, Staff Physician, Department of Emergency Medicine, Stanford University and James D R Foster, MD, MS, Consulting Staff, Department of Emergency Medicine, Palomar Medical Center, Alvarado Hospital Medical Center. Article covers workup and treatment and includes references.

Article by Richard P. Sandor, MD from The Physician and Sportsmedicine June 1997.

FDA article by Rebecca D. Williams.

Article covers diagnosis and management.

Article covers diagnosis and management.