RT Journal Article SR Electronic T1 Avascular necrosis after a steroid injection JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 814 OP 814-a DO 10.1503/cmaj.1060233 VO 176 IS 6 A1 Izge Gunal A1 Vasfi Karatosun YR 2007 UL http://www.cmaj.ca/content/176/6/814.2.abstract