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Hoekman, Daniël R., Mark Löwenberg, Gijs R. van den Brink, Cyriel Y. Ponsioen, Marc A. Benninga, και Geert R. D’Haens. "A Prospective Study Comparing Patient-reported Outcomes in Crohn’s Disease." Eur J Gastroenterol Hepatol 2020.

Hoekman, Daniël R., et al. "A Prospective Study Comparing Patient-reported Outcomes in Crohn’s Disease." Eur J Gastroenterol Hepatol 2020.