[1] Dr Soetomo Gen Acad Hosp, Dept Child Hlth, Surabaya, Indonesia
[2] Univ Airlangga, Fac Med, Dept Child Hlth, Surabaya, Indonesia
[3] FrieslandCampina AMEA, Singapore, Singapore
[4] Vrije Univ Brussel VUB, UZ Brussel, KidZ Hlth Castle, Brussels, Belgium
[5] Univ Indonesia, Dr Cipto Mangunkusumo Hosp, Fac Med, Dept Child Hlth, Jakarta, Indonesia
[6] Dr Soetomo Gen Acad Hosp, Dept Child Hlth, Moestopo St 6-8, Surabaya 60286, Indonesia