- Correspondence to Dr Wafaa Eyaid Department of Pediatrics, King Abdulaziz Medical City (KAMC)/Ministry of National Guard-Health Affairs (MNG-HA), King Abdullah International Medical Research Center (KAIMRC)/King Saud bin Abdulaziz University for Health Sciences (KSAU-HS), P. O. Box 22490, Riyadh 11426, Saudi Arabia;
- Received 22 June 2016
- Revised 17 November 2016
- Accepted 19 November 2016
- Published online 31 January 2017.