RT Journal Article SR Electronic T1 Corticosteroids and avascular necrosis of the femoral head JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 397 OP 399 VO 165 IS 4 A1 Michael D. McKee A1 James P. Waddell A1 Patricia A. Kudo A1 Emil H. Schemitsch A1 Robin R. Richards YR 2001 UL http://www.cmaj.ca/content/165/4/397.3.abstract