Social relations and smoking abstinence among ever-smokers: a report from two large population-based Danish cohort studies

Lone Ross, Birthe Lykke Riegels Thomsen, Sidsel Helle Boesen, Kirsten Frederiksen, Rikke Lund, Christian Munk, Susanne Oksbjerg Dalton, Pernille Envold Hansen Bidstrup, Susanne Krüger Kjær, Anne Tjønneland, Christoffer Johansen