Spee, L. A., van den Hurk, A. P., van Leeuwen, Y., Benninga, M. A., Bierma-Zeinstra, S. M., Passchier, J., & Berger, M. Y. (2010). Childhood abdominal pain in primary care: Design and patient selection of the HONEUR abdominal pain cohort. BioMed Central.

Spee, Leo AA, Arjan PJM van den Hurk, Yvonne van Leeuwen, Marc A. Benninga, Sita MA Bierma-Zeinstra, Jan Passchier, a Marjolein Y. Berger. Childhood Abdominal Pain in Primary Care: Design and Patient Selection of the HONEUR Abdominal Pain Cohort. BioMed Central, 2010.

Spee, Leo AA, et al. Childhood Abdominal Pain in Primary Care: Design and Patient Selection of the HONEUR Abdominal Pain Cohort. BioMed Central, 2010.