Methods
The study was conducted at the children’s outpatient clinic (CHOP) of University of Nigeria Teaching Hospital (UNTH), Ituku- Ozalla, Enugu South East Nigeria between 1st February to 30th June, 2013. UNTH, Enugu is a five hundred bedded reference tertiary health facility in Enugu State, South East Nigeria. It serves over the three million citizens of Enugu State [7] and is a referral centre to the neighbouring south eastern states of Nigeria. The CHOP renders primary, secondary as well as tertiary healthcare services to children obtainable in the general out patients’ clinic, consultant/specialist clinics every weekday and it is the initial port of call of new patients except emergencies which usually go to the emergency unit or the new born special care unit as the case may be.