1. N. Tasdemir:
Neurology & NeuroSurgery Department, Dicle University Medical Faculty, Diyarbakir, Turkey
2. H. E. Ak:
Neurology & NeuroSurgery Department, Dicle University Medical Faculty, Diyarbakir, Turkey
3. M. M. Robertson:
The Natural Hospital Nervous Disease, Institute Neurology, London, UK
4. M. Trimble:
The Natural Hospital Nervous Disease, Institute Neurology, London, UK