1. Center for Hip and Knee Replacement (CHKR), Department of Orthopaedic Surgery, NewYork-Presbyterian Hospital, Columbia University Medical Center, 622 W. 168th Street, PH 1155, New York, NY 10032, USA
2. Department of Radiology, NewYork-Presbyterian Hospital, Columbia University Medical Center, 177 Fort Washington Avenue 3-256, New York, NY 10032, USA