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 Piuzzi, Nicolas S. A1 Anis, Hiba K. A1 Muschler, George F. YR 2019 UL http://www.ccjm.org/content/86/8/511.abstract AB