Essentials of research methods in neurosurgery and allied sciences for research, appraisal and application of scientific information to patient care (Part I)

From the Department of Neurosurgery (Esene, El-Shehaby), Ain Shams University, the Gamma Knife Center (Esene, El-Shehaby), Nasser Institute, Cairo, Egypt, and the Division of Neurosurgery (Baeesa), Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia

From the Department of Neurosurgery (Esene, El-Shehaby), Ain Shams University, the Gamma Knife Center (Esene, El-Shehaby), Nasser Institute, Cairo, Egypt, and the Division of Neurosurgery (Baeesa), Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia

From the Department of Neurosurgery (Esene, El-Shehaby), Ain Shams University, the Gamma Knife Center (Esene, El-Shehaby), Nasser Institute, Cairo, Egypt, and the Division of Neurosurgery (Baeesa), Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia