Marieke Biegstraaten, Ivo N van Schaik, Wouter Wieling, Frits A Wijburg and Carla EM Hollak*
* Corresponding author: Carla EM Hollak c.e.hollak@amc.uva.nl
BMC Neurology 2010, 10:38 doi:10.1186/1471-2377-10-38