Kassahun, Woubet Tefera
Article History
Received: 24 January 2018
Accepted: 25 June 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: This study was approved by the institutional ethic committee review board of the medical faculty of the University of Leipzig in Leipzig, Germany. Registration number: 347/17-ek. Formal written informed consent from participants or health care proxies was obtained during admission for surgery. Given the anonymous nature of the data, written informed consent from patients or health care proxies was not required to conduct this research.
: Not applicable
: The author declares that he has no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.