Correction: Observational study assessing demographic, economic and clinical factors associated with access and utilization of health care services of patients with multiple sclerosis under treatment with interferon beta-1b (EXTAVIA)

• Georgios Hadjigeorgiou,
• Efthimios Dardiotis,
• Georgios Tsivgoulis,
• Triantafyllos Doskas,
• Damianos Petrou,
• Nikolaos Makris,
• Nikolaos Vlaikidis,
• Thomas Thomaidis,
• Athanasios Kyritsis,
• Nikolaos Fakas,
• Xoulietta Treska,
• Clementine Karageorgiou,
• Stefania Sotirli,
• Christos Giannoulis,
• Dimitra Papadimitriou,
• Ioannis Mylonas,
• Evaggelos Kouremenos,
• George S. Vlachos,
• Dimitrios Georgiopoulos,
• Despoina Mademtzoglou,
• Michalis Vikelis,
•  [ ... ],
• Elias Zintzaras
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