Ludwig, A., Miani Vial, C., Breckenkamp, J., Sauzet, O., Borde, T., Doyle, I.-M., Brenne, S., Höller-Holtrichter, C., David, M., Spallek, J. & Razum, O. (2020). Are Social Status and Migration Background Associated with Utilization of Non-medical Antenatal Care? Analyses from Two German Studies. Maternal and child health journal, 24, 943–952. Springer Nature. doi:10.1007/s10995-020-02937-z.