Bibliography (11):

1. ​ Nicotine

2. Association of E-Cigarette Use With Respiratory Disease Among Adults: A Longitudinal Analysis

3. E-Cigarettes and Respiratory Disease: A Replication, Extension, and Future Directions

4. Use of Nicotine Replacement Therapy in Adolescent Smokers and Nonsmokers

5. Persistent use of nicotine replacement therapy: an analysis of actual purchase patterns in a population based sample

6. Nicotine Acutely Enhances Reinforcement from Non-Drug Rewards in Humans

7. Dependence on tobacco and nicotine products: a case for product-specific assessment

8. Wikipedia Bibliography:

   1. Electronic cigarette

   2. https://en.wikipedia.org/wiki/Cigarette  :

      https://en.wikipedia.org/wiki/Cigarette

   3. Confidence interval

   4. Odds ratio