Sørensen Per Soelberg, Koch-Henriksen Nils, Jensen Poul Erik Hyldgaard
Danish Multiple Sclerosis Center, Department of Neurology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
Neurology. 2011 Feb 22;76(8):759-60. doi: 10.1212/WNL.0b013e31820d62a4.