L. Abidi, G. E. Nagelhout, R. Spruijt, H. Schutte, and H. de Vries, “A quasi-experimental study evaluating a health promotion program targeting healthy nutrition, physical activity and social network enhancement for low-income multi-problem households: study protocol”, Int J Clin Trials, vol. 5, no. 3, pp. 132–141, Jul. 2018.