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Van der Helm, Jannie J., Maarten Franciscus Schim van der Loeff, Esther de Vries, Charlotte van der Veer, Antoon W. Grünberg, Dennis Mans, and Henry J C. de Vries. "Vaginal Herb Use and Chlamydia Trachomatis Infection: Cross-sectional Study Among Women of Various Ethnic Groups in Suriname." BMJ Open 2019.

Van der Helm, Jannie J., et al. "Vaginal Herb Use and Chlamydia Trachomatis Infection: Cross-sectional Study Among Women of Various Ethnic Groups in Suriname." BMJ Open 2019.