Ultrasound-guided injection procedure
All interventional procedures were performed with patients seated, arm hanged by side, under complete aseptic conditions and upon real-time sonographic guidance. A 5-cm 21-gauge needle was inserted parallel to the long axis of the ultrasound transducer (lateral approach) and advanced under continuous guidance into the subacromial space.Patients were instructed to avoid lifting weights on the affected limb for 2 weeks [