1. Petty RE. Rev Rhum Engl Ed 1997; 64:161S–162S.
2. Hollister J. In Hay WW, Levin MJ, Sondheimer JM, Deterding RR (eds.): Current Diagnosis & Treatment in Pediatrics, 18th edn. New York: Lange Medical Books/McGraw – Hill Medical Publishing Division, 2007.
3. Wright D. In Morrissy R, Weinstein S (eds.): Lovell & Winter’s Pediatric Orthopedics, 6th edn. Philadelphia: Lippincott Williams & Wilkins, 2006; 406–410.
4. Yulish BS, Lieberman JM, Newman AJ, Bryan PJ, Mulopulos GP et al. Radiology 1987; 165:149–152.
5. Minden K, Niewerth M, Listing J et al. Arthritis Rheum 2002; 46:2392–2401.