@article{DeLaCalle:151308,
      author        = "De La Calle, M. and Delgado, J.L. and Verlohren, S. and
                       Escudero, A.I. and Bartha, J.L. and Campillos, J.M. and
                       Aguarón De La Cruz, A. and Chantraine, F. and García
                       Hernández, J.Á. and Herraiz, I. and Llurba, E. and Kurka,
                       H. and Guo, G. and Sillman, J. and Hund, M. and Perales
                       Marín, A.",
      title         = "{Gestational Age-Specific Reference Ranges for the
                       sFlt-1/PlGF Immunoassay Ratio in Twin Pregnancies}",
      year          = "2021",
}