Pedersen, Alma B
Horváth-Puhó, Erzsébet
Ehrenstein, Vera
Rørth, Mikael
Sørensen, Henrik T
Article History
Received: 6 January 2017
Revised: 24 April 2017
Accepted: 27 April 2017
First Online: 18 May 2017
Competing interests
: The authors declare no conflict of interest.