nicotine dependence Keyword: nicotine dependence 1 Question Articles Volume 4, Issue 4Dopamine receptor gene DRD1 (A-48G) polymorphism and smoking related behavior among smokers of Punjab (North West India) J. Kaur and R. Kaur November 7, 2015 Human genetics DRD1, FTND, Genetic polymorphism, nicotine dependence, North West Indian region,