Corrigendum to “Analytical validation of protein biomarkers for risk of spontaneous preterm birth” [Clin. Mass Spectrom. 3 (2017) 25–38] oleh Chad Bradford, Rob Severinsen, Trina Pugmire, Matison Rasmussen, Kathryn Stoddard, Yuta Uemura, Spencer Wheelwright, Marija Mentinova, Daniel Chelsky, Stephen W. Hunsucker, Paul Kearney, Durlin Hickok, Tracey C. Fleischer, Ilia Ichetovkin, J. Jay Boniface, Gregory C. Critchfield, John M. Peltier