Türkoğlu, E., Sönmez, C., Özer, E., Çöplü, N., & Kurugöl, Z. (2016). Low pertussis antibody levels in maternal and umbilical cord blood samples in Turkey. The Turkish Journal of Pediatrics, 58(6), 573-578. https://doi.org/10.24953/turkjped.2016.06.001