1. Department of Pediatrics, Infectious Disease Division, King Faisal Hospital & Research Centre. Riyadh, Saudi Arabia
2. Correspondence: Dr. Badria Al-Waili · Department of Pediatrics, Infectious Disease Division, King Faisal Hospital & Research Centre, PO Box 3354. Riyadh, 11211. Saudi Arabia · T:+00966558486436 · bwaili@yahoo.com
3. Department of Microbiology, King Faisal Hospital & Research Centre, Riyadh, Saudi Arabia