Faruk İldan1, Tahsin Erman1, A. İskender Göçer1, Metin Tuna1, Hüseyin Bağdatoğlu1, Erdal Çetinalp1, Refik Burgut2
1Department of Neurosurgery, Çukurova University, School of Medicine, Adana, Turkey
2Department of Biostatistics, Çukurova University School of Medicine, Adana, Turkey