1. Dr Abd‐ElHady is Assistant Lecturer of Neurology at Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
2. Dr Hashish is Lecturer of Neurology at Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
3. Dr Yassine is Lecturer of Neurology at Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
4. Professor Anani is Professor of Clinical Pathology at Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
5. Professor Negm is Professor of Neurology at Faculty of Medicine, Suez Canal University, Ismailia, Egypt.