Study protocol: the Labor Progression Study, LAPS - does the use of dynamic progression guideline in labor reduce the rate of intrapartum cesarean sections in nulliparous women? A multicenter, cluster randomized trial in Norway. Bernitz, Stine, Dalbye, Rebecka, Øian, Pål, Zhang, J, Eggebø, Torbjørn Moe, Blix, Ellen (2017)
