RT Journal Article SR Electronic T1 Avascular necrosis of the femoral heads after single corticosteroid injection JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 31 OP 31-b DO 10.1503/cmaj.051638 VO 175 IS 1 A1 Izge Gunal A1 Vasfi Karatosun YR 2006 UL http://www.cmaj.ca/content/175/1/31.3.abstract