[1] Univ Colorado, Sch Med, Dept Family Med, Div Sports Med,AFW Clin, 3055 Roslyn St, Denver, CO 80238 USA
[2] Johns Hopkins Univ, Sch Med, Dept Orthopaed Surg, Baltimore, MD USA
[3] Univ Colorado, Sch Med, Dept Family Med, Denver, CO USA
[4] Univ Colorado, Sch Med, Dept Orthopaed Surg, Div Sports Med & Shoulder Surg, Aurora, CO USA