¹Orthopaedic Research Laboratory, Departments of Orthopaedic Surgery and Mechanical Engineering, Columbia University, New York, New York 10032, U.S.A.

²Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Columbia University, New York, New York 10032, U.S.A.

DOI: 10.1007/978-1-4612-3448-7_8