TY - JOUR T1 - Risk factors for cervical cancer in China: a case-control study A1 - Cai,H.B. A1 - Ding,X.H. A1 - Zhou,Y.F. A1 - Lie,D.M. JO - European Journal of Gynaecological Oncology VL - 29 IS - 1 SP - 72 EP - 75 SN - 2709-0086 Y1 - 2008 ER -