1. Sleman District Hospital; Child Health Department; Jl Weling I no 107 G, CT VIII, Karang Gayam Yogyakarta Daerah Istimewa Yogyakarta Indonesia 55281
2. Gadjah Mada University; Department of Obstetrics and Gynaecology, Faculty of Medicine; DR.Sardjito Hospital Jl. Kesehatan No.1, Sekip Yogyakarta Daerah Istimewa Yogyakarta Indonesia 55281
3. Monash University; School of Public Health & Preventive Medicine; The Alfred Centre 99 Commercial Road Melbourne Victoria Australia 3004