1. Department of Orthopaedics, Keck School of Medicine, University of Southern California + Los Angeles County Medical Center, 1200 North State Street, GNH 3900, Los Angeles, CA 90033, USA
2. Department of Pathology, Keck School of Medicine, University of Southern California + Los Angeles County Medical Center, 1200 North State Street, CT A7A, Los Angeles, CA 90033, USA