Hogenkamp, P S
Zhou, W
Dahlberg, L S
Stark, J
Larsen, A L
Olivo, G
Wiemerslage, L
Larsson, E-M
Sundbom, M
Benedict, C
Schiƶth, H B
Article History
Received: 11 November 2015
Revised: 23 May 2016
Accepted: 31 May 2016
First Online: 7 June 2016
Competing interests
: The authors declare no conflict of interest.