Research on ways to improve childhood obesity care. Through qualitative and quantitative research. This research is linked to the Partnership Overweight Netherlands (PON) and the implementation of the "Integrated health care standard for obesity management" (Zorgstandaard Obesitas) for children through the project Care for Obesity (C4O) which aims at chronic, coordinated care for children with overweight and obesity and is financed by the Dutch Ministry of Health, Welfare and Sport.