Volume 19-Issue 2-2012 Knowledge and attitude of nurses in Renal Dialysis Units regarding infection control, Riyadh city, Saudi Arabia, 2012. Etiology of Upper Respiratory Tract Infection among International Pilgrims arriving for Hajj 2010 G. Assessment of knowledge, attitude and practices of Omani Ministry of Health physicians toward surveillance system, in Dakhliyah region, Oman.