1. Department of Anaesthesia, ICU and Pain Management Ain Shams University Cairo Egypt
2. Department of Otorhinolaryngology Ain Shams University Cairo Egypt
3. Faculty of Medicine Ain Shams University Cairo Egypt
4. Online Research Club (http://www.onlineresearchclub.org/) Nagasaki Japan
5. Therapeutic Department, Egyptian National Blood Transfusion Services Cairo Egypt
6. Institute of Research and Development Duy Tan University Da Nang Vietnam