Article History
Received: 14 May 2018
Accepted: 19 July 2018
First Online: 21 August 2018
Compliance with ethical guidelines
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: J. Kany is consultant for VIMS & DePuy, Mitek and receives royalties from FH Orthopedics (Arrow shoulder prosthesis). J.D. Werthel receives royalties from FH Orthopedics (Arrow shoulder prosthesis). H. Anis declares that he has no competing interests.
: This article does not contain any studies with human participants or animals performed by any of the authors.