[1] City Hosp Bydgoszcz, Dept Neurol, Bydgoszcz, Poland
[2] Univ Cincinnati, Med Ctr, Dept Neurol, Cincinnati, OH 45267 USA
[3] Antiepilept Outpatients Clin, Bydgoszcz, Poland
[4] Univ Cincinnati, Med Ctr, Inst Hlth Policy & Hlth Serv Res, Cincinnati, OH 45267 USA