Kukkonen Juha, Joukainen Antti, Itälä Ari, and Äärimaa Ville. 2012. “Operatively Treated Traumatic Versus Nontraumatic Rotator Cuff Ruptures: A Registry Study”. Upsala Journal of Medical Sciences 118 (1). https://doi.org/10.3109/03009734.2012.715597.