1. Department of Paediatrics, Kurmitola General Hospital, Dhaka, Bangladesh
2. Upazilla Health Complex, Chandina, Bangladesh
3. Department of Paediatrics, Shaheed M Monsur Ali Medical College & Hospital, Sirajgonj, Bangladesh
4. Department of Neonatology, Bangabandhu Sheikh Mujib Medical University Shahbag, Dhaka, Bangladesh