1. Universitas Padjadjaran Faculty of Medicine, Department of Child Health, Bandung, Indonesia

2. Aschauhof, Eckernfoerde-Altenhof, Germany

3. University of Potsdam, Human Biology, Potsdam, Germany

4. Universitas Indonesia-Ciptomangunkusumo Hospital, Faculty of Medicine, Department of Child Health, Jakarta, Indonesia

5. Universitas Padjadjaran Faculty of Medicine, Department of Orthopedics and Traumatology, Bandung, Indonesia

6. Universitas Padjadjaran Faculty of Mathematics and Natural Sciences, Department of Statistics, Bandung, Indonesia

7. Universitas Padjadjaran Faculty of Medicine, Department of Physical Medicine and Rehabilitation, Bandung, Indonesia