Dimitrios Papadopoulos1, Dimos-Dimitrios D Mitsikostas2. 1. Multiple Sclerosis Centre and Neurology Section, Athens Medical Centre-Paleo Phaliro Clinic, 17562, Athens, Greece. 2. 1st Neurology Department, Aeginition Hospital, Medical School, National and Kapodistrian University of Athens, 72-74V. Sophia's Avenue, 11528, Athens, Greece. dmitsikostas@med.uoa.gr.