Erratum to:

Obere Extremität 2021

https://doi.org/10.1007/s11678-021-00628-x

Due to a technical problem, the article “Supraspinatus tear—a mechanical outlet impingement lesion?”, written by J. Engelke, M. Loew, S. Sulzer, S. Lichtenberg, and M. Schnetzke, was originally published electronically on the publisher’s internet portal on 18 February 2021 without open access. With the author(s)’ decision to opt for Open Choice, the copyright of the article changed on 26 May 2021 to © The Author(s) 2021 and the article is forthwith distributed under a Creative Commons Attribution.