Hochrein, Alfred
Zinser, Wolfgang
Spahn, Gunter
Angele, Peter
Löer, Ingo
Albrecht, Dirk
Niemeyer, Philipp
Article History
Received: 28 April 2018
Accepted: 21 August 2018
First Online: 30 August 2018
Compliance with ethical standards
: The study was registered at the DRKS website (DRKS Number: DRKS00005617) and approved by the ethical committee (Approval Number 105/13 (Freiburg University). Informed consent was given by all patients.
: The authors declare that they have no conflict of interest.