1. Department of Orthopaedic Surgery, Musculoskeletal Research Center; Washington University School of Medicine at Barnes-Jewish Hospital; 425 S. Euclid Avenue MS 8233 St. Louis Missouri 63110
2. Department of Biology; Loyola University; 1050 W. Sheridan Road Chicago Illinois 60660
3. Department of Biomedical Engineering; Washington University in St. Louis at Engineering and Applied Sciences; Whitaker Hall, MS 1097 St. Louis MO 63130
4. Department of Cell Biology and Physiology; Washington University School; of Medicine at Barnes-Jewish Hospital; 425 S. Euclid Avenue MS 8233 St. Louis Missouri 63110