Vos, A. A., van Voorst, S. F., Waelput, A. J., de Jong-Potjer, L. C., Bonsel, G. J., Steegers, E. A., & Denktaş, S. (2015). Effectiveness of score card-based antenatal risk selection, care pathways, and multidisciplinary consultation in the Healthy Pregnancy 4 All study (HP4ALL): Study protocol for a cluster randomized controlled trial. Trials.

Vos, Amber A., Sabine F. van Voorst, Adja JM Waelput, Lieke C. de Jong-Potjer, Gouke J. Bonsel, Eric AP Steegers, ja Semiha Denktaş. "Effectiveness of Score Card-based Antenatal Risk Selection, Care Pathways, and Multidisciplinary Consultation in the Healthy Pregnancy 4 All Study (HP4ALL): Study Protocol for a Cluster Randomized Controlled Trial." Trials 2015.

Vos, Amber A., et al. "Effectiveness of Score Card-based Antenatal Risk Selection, Care Pathways, and Multidisciplinary Consultation in the Healthy Pregnancy 4 All Study (HP4ALL): Study Protocol for a Cluster Randomized Controlled Trial." Trials 2015.