Text and Data Mining valid from 2018-01-31
Received: 19 September 2017
Accepted: 11 January 2018
First Online: 31 January 2018
Compliance with ethical standards
: NNA, SAA, FF, MMH, FKA, IK, FM, SKN, AP, WR, HS, and BS declare no conflict of interest. NS declares conflict of interest directly related to the submitted work. IRD, RHF, MM, AM, SM, FM, MS, CS, and GW declare conflict of interest not directly related to the submitted work. FK declares conflict of interest directly and not directly related to the submitted work.
: This article does not contain any studies with human participants or animals performed by the authors.
: This article does not contain any study with animals performed by any of the authors.
: For this type of article informed consent is not required.