Fallah, M
Kharazmi, E
Pukkala, E
Tretli, S
Olsen, J H
Tryggvadottir, L
Sundquist, K
Hemminki, K
Article History
Received: 14 July 2015
Revised: 21 September 2015
Accepted: 28 September 2015
First Online: 6 October 2015
Competing interests
: The authors declare no conflict of interest.