2. MacDougall D M, Halperin B A, MacKinnon-Cameron D, et al. The challenge of vaccinating adults: attitudes and beliefs of the Canadian public and healthcare providers. BMJ Open. 2015 Sept; 5:9.
3. Dube E, Laberge C, Guay M, et al. Vaccine Hesitancy: an overview. Human Vaccinations and Immunotherapy. 2013 Aug; 9:8, 1763-1773.
4. Johnson DR, Nichol K, Lipczynski K. Barriers to Adult Immunization. The American Journal of Medicine. 2008 July; 121(7), S28-S35.
5. Centers for Disease Control and Prevention (US). Advisory Committee on Immunization Practices. Available from: URL: http://www.cdc.gov/vaccines/acip/index.html
6. American College of Physicians. Adult Immunization & Quality Improvement for Residents. Available from: URL: https://www.acponline.org/practice-resources/quality-improvement/acp-quality-connect/adult-immunization-quality-improvement-for-residents