Corrigendum to: Ultrasound-guided subacromial-subdeltoid bursa corticosteroid injections: a study of short- and long-term outcomes [Clin Radiol 73 (8)(2018) e7–e12]. Issue 12 (December 2018) - Fawcett, R.; Grainger, A.; Robinson, P.; Jafari, M.; Rowbotham, E.