Periconceptional Maternal Protein Intake from Animal and Plant Sources and the Impact on Early and Late Prenatal Growth and Birthweight: The Rotterdam Periconceptional Cohort oleh Sofie van Zundert, Simone van der Padt, Sten Willemsen, Melek Rousian, Mina Mirzaian, Ron van Schaik, Régine Steegers-Theunissen, Lenie van Rossem