Text and Data Mining valid from 2018-11-11
Received: 25 July 2018
Accepted: 2 November 2018
First Online: 11 November 2018
Compliance with ethical standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: Treatment of the patient, preparation of the manuscript and discussion in the context of published literature comply with ethical standards and are in agreement with the Declaration of Helsinki.