1. Department of Terengganu State Health, Wisma Persekutuan, Jalan Sultan Mohamad, Kuala Terengganu, Terengganu, Malaysia
2. Department of Community Medicine, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
3. Kelantan State Health Department, Maternal and Child Health Unit, Kota Bharu, Kelantan, Malaysia
4. Adolescent Health Sector, Family Health Development Division, Ministry of Health, Parcel E, Federal Government Administration Centre, Putrajaya, Malaysia