1. Department of Physiology, Faculty of Medicine, Universitas Syiah Kuala, 23111 Banda Aceh, Aceh, Indonesia.
2. Department of Neurology, Dr. Zainoel Abidin Hospitals, Faculty of Medicine, Universitas Syiah Kuala, 23111 Banda Aceh, Aceh, Indonesia.
3. Department of Clinical Pathology, Faculty of Medicine, Universitas Syiah Kuala, 23111 Banda Aceh, Aceh, Indonesia.