Grønhøj, Christian
Jensen, David H.
Dehlendorff, Christian
Marklund, Linda
Wagner, Steffen
Mehanna, Hisham
Munck-Wikland, Eva
Ramqvist, Torbjörn
Näsman, Anders
Wittekindt, Claus
Würdemann, Nora
Sharma, Shachi Jenny
Gattenlöhner, Stefan
Kiss, Katalin
Andersen, Elo
Spruce, Rachel
Batis, Nikos
Robinson, Max
Harrington, Kevin
Winter, Stuart
Jones, Terence M.
Klussmann, Jens Peter
Dalianis, Tina
Friborg, Jeppe
von Buchwald, Christian
Article History
Received: 17 November 2017
Revised: 2 March 2018
Accepted: 12 April 2018
First Online: 24 May 2018
Competing interests
: The authors declare no competing interests.
: Information on data supporting the results is available from the corresponding author by special request.
: Ethical approval was obtained for all centres included in this study. The study was performed in accordance with the Declaration of Helsinki.