1. Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA 01003, USA
2. Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA 90033, USA
3. Department of Anatomy, Midwestern University, Glendale, AZ 85308, USA
4. School of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA