00695nas a2200313   4500000000100000008004100001100000900042700000900051700000900060700001200069700001900081700000900100700001000109700000900119700001100128700000900139700001100148700001000159700001100169700001100180700001000191700001100201700000900212700001000221700001000231700001000241700000900251245012100260       2018                            d1 aLi S1 aLu J1 aHu F1 aCheng K1 aRamakrishnan R1 aHe J1 aLai Y1 aLi W1 aXuan Z1 aHu Y1 aChen N1 aWei X1 aYuan M1 aShen S1 aQiu L1 aChen O1 aHu C1 aMol B1 aXia H1 aQiu X1 aon b00aPrediction of Preterm Birth from Early Pregnancy Characteristics in a Chinese Population: a Prospective Cohort Study