HEADACHE: Edited by Manjit Matharu
Holle, Dagny; Obermann, Mark
Department of Neurology, University of Duisburg-Essen, Essen, Germany
Correspondence to Mark Obermann, MD, Department of Neurology, University of Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany. Tel: +49 201 723 84385; fax: +49 201 723 5542; e-mail: [email protected]