Buttenschøn, H N
Demontis, D
Kaas, M
Elfving, B
Mølgaard, S
Gustafsen, C
Kaerlev, L
Petersen, C M
Børglum, A D
Mors, O
Glerup, S
Article History
Received: 29 June 2015
Revised: 17 September 2015
Accepted: 19 September 2015
First Online: 10 November 2015
Competing interests
: The authors declare no conflict of interest.