“…The total volume of solution injected included 1 mL, (15) 2 mL, (17) 3 mL, (16) 4 mL, (8) 5 mL (9,21) and 9 mL. (22) Five studies used ultrasonography-guided injection (8,9,19,21,22) and one used fl uoroscopic guidance. (17) With the exception of two studies that compared glenohumeral and subacromial injections, (21,22) seven studies used glenohumeral approaches (8,9,15,(17)(18)(19)(20) and one used a combined subacromialglenohumeral approach.…”