doi.org/10.1002/14651858.CD008128, hdl.handle.net/1765/26901
Cochrane Database of Systematic Reviews
Erasmus MC: University Medical Center Rotterdam

Henriquez, D., Roos-Hesselink, J., Schalij, M. J., Klautz, R., Helmerhorst, F. M., & de Groot, C. (2009). Treatment of valvular heart disease during pregnancy for improving maternal and neonatal outcome. Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD008128