∗Referral Center for Autonomic Nervous System Disorders, Department of Neurology, University Hospital Center Zagreb

†School of Medicine, University of Zagreb, Zagreb, Croatia.

Author contributions: study concept and design, acquisition of data, analysis and interpretation of data, drafting of the manuscript, critical revision of the manuscript for important intellectual content, administrative, technical, and material support (I.A., M.H.).

Conflicts of Interest and Source of Funding: I.A. participated as a clinical investigator and/or received consultation and/or speaker fees from Biogen, Sanofi Genzyme, Merck, Bayer, Novartis, Pliva/Teva, Roche, Alvogen, Actelion, Alexion Pharmaceuticals, and TG Pharmaceuticals. M.H. participated as a clinical investigator and/or received consultation and/or speaker fees from Biogen, Sanofi Genzyme, Merck, Bayer, Novartis, Pliva/Teva, Roche, Alvogen, Actelion, Alexion Pharmaceuticals, and TG Pharmaceuticals.

No funding was received for this study.

Address correspondence and reprint requests to Mario Habek, MD, PhD, Department of Neurology, University Hospital Center Zagreb, Kišpatićeva 12, HR-10000 Zagreb, Croatia; E-mail: [email protected]