[1] Univ Delaware, Biomech & Movement Sci Phys Therapy, Newark, DE USA
[2] Univ Delaware, Delaware Rehabil Inst, Phys Therapy Biomech & Movement Sci, Biomed Engn, Newark, DE 19716 USA
[3] Norwegian Sch Sport Sci, Dept Sport Med, Oslo, Norway
[4] Oslo Univ Hosp, Div Orthopaed Surg, Oslo, Norway
[5] Norwegian Sch Sport Sci, Oslo Sport Trauma Res Ctr, Oslo, Norway
[6] Karolinska Inst, Dept Mol Med & Surg, Stockholm Sports Trauma Res Ctr, Stockholm, Sweden