Clinically isolated syndrome and multiple sclerosis in children: a single center study - Gonca Bektaş; Melis Ulak Özkan; Edibe Pembegül Yıldız; Tuğçe Aksu Uzunhan; Serra Sencer; Nur Aydınlı; Mine Çalışkan; Meral Özmen (The Turkish Journal of Pediatrics)