Ramanauskaite, Ausra
Becker, K.
Kassira, H. C.
Becker, J.
Sader, R.
Schwarz, F.
Article History
Received: 16 April 2019
Accepted: 8 August 2019
First Online: 15 August 2019
Compliance with ethical standards
: The study protocol was in accordance with the Helsinki Declaration as revised in 2013 and was approved by the local ethics committee (Study Nr. 4301).
: The authors declare that they have no conflicts of interest.
: The article does not contain any studies with human participants.
: For the systematic review, formal consent is not required.