Performance of a proteomic preterm delivery predictor in a large independent prospective cohort. - Markenson GR; Saade GR; Laurent LC; Heyborne KD; Coonrod DV; Schoen CN; Baxter JK; Haas DM; Longo S; Grobman WA; Sullivan SA; Major CA; et al. (American journal of obstetrics & gynecology MFM, 2020)