1. College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania, U.S.A.
2. Department of Orthopedics and Rehabilitation, College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania, U.S.A.
3. Division of Biostatistics and Bioinformatics, Department of Public Health Sciences, College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania, U.S.A.
4. Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania, U.S.A.