Andresen, S R
Biering-Sørensen, F
Hagen, E M
Nielsen, J F
Bach, F W
Finnerup, N B
Article History
Received: 21 January 2016
Revised: 7 March 2016
Accepted: 7 March 2016
First Online: 12 April 2016
Competing interests
: NBF reports honoraria from Pfizer and Grünenthal and grants from IMI Europain (EU/EFPIA) outside the submitted work. FWB has received investigator fees from Pfizer and Grunenthal. The remaining authors declare no conflict of interest.