Assessment of knowledge, attitude, and practice about first aid among male school teachers and administrators in Riyadh, Saudi Arabia oleh Ibrahim Adel AlYahya, Hamad Adel Almohsen, Ibrahim Ahmed AlSaleem, Mishari Mohammed Al-Hamid, Ali Mohammedirfan Arafah, Yousef Abdullah Al Turki, Abdulmajeed Abdulrahman Aljasser, Mohammad Abdullah Alkharfi