Łagowska, Karolina, and Joanna Pieczyńska. “Maternal Phenylketonuria: Newborn Outcomes in Women Treated and Not Treated before Pregnancy: Maternal Phenylketonuria”. Progress in Nutrition, vol. 23, no. 2, July 2021, p. e2021215, https://doi.org/10.23751/pn.v23i2.9787.