RT Journal Article SR Electronic T1 Osteonecrosis of the femoral head with subchondral collapse JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 511 OP 512 DO 10.3949/ccjm.86a.19004 VO 86 IS 8 A1 Nicolas S. Piuzzi A1 Hiba K. Anis A1 George F. Muschler YR 2019 UL http://www.ccjm.org/content/86/8/511.abstract AB