Arthroscopic surgery versus supervised exercises in patients with rotator cuff disease (impingement syndrome): a prospective, randomized, controlled in 125 patients with a 2 1/2-year follow-up - Brox, Jt E; Uppheim, G; Bohmer, A S; Brevik, J I; Ljunggren, A E; Statt, P H (Shoulder Elbow, 1999)