Philip W McClure, Jason Bialker, Nancy Neff, Gerald Williams, Andrew Karduna, Shoulder Function and 3-Dimensional Kinematics in People With Shoulder Impingement Syndrome Before and After a 6-Week Exercise Program, Physical Therapy, Volume 84, Issue 9, 1 September 2004, Pages 832–848, https://doi.org/10.1093/ptj/84.9.832