Xu, Huilan, Egger, Sam, Velentzis, Louiza S., O'Connell, Dianne L., Banks, Emily, Darlington-Brown, Jessica, Canfell, Karen, Sitas, Freddy. Elsevier; 2018. Hormonal contraceptive use and smoking as risk factors for high-grade cervical intraepithelial neoplasia in unvaccinated women aged 30-44 years: A case-control study in New South Wales, Australia.