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Truijens, Sophie EM, Margreet Meems, Simone MI Kuppens, Maarten AC Broeren, Karin CAM Nabbe, Hennie A. Wijnen, S Guid Oei, Maarten JM van Son, and Victor JM Pop. The HAPPY Study (Holistic Approach to Pregnancy and the First Postpartum Year): Design of a Large Prospective Cohort Study. BioMed Central, 2014.

Truijens, Sophie EM, et al. The HAPPY Study (Holistic Approach to Pregnancy and the First Postpartum Year): Design of a Large Prospective Cohort Study. BioMed Central, 2014.