Our Team A team of board certified orthopedic specialists and advanced trained physical therapists treat children of all ages in the Center for Motion Analysis. Kristan Pierz, MD Medical Director, Center for Motion Analysis Jeffrey Thomson, MD Division Head, Orthopaedics Chief, Department of Orthopaedic Surgery Sonia Chaudhry, MD Mark Lee, MD Philip Mack, MD Janet Zahradnik, MD Katharine J. Bell, MS Analyst Nance Cashman Manager, Center for Motion Analysis and Physical Therapy Erin Garibay, MS Biomechanist Sylvia Õunpuu, MSc Director, Research Kelly V. Pogemiller, DPT Jennifer Rodriguez-MacClintic, PT, DPT, PCS