1) Sabate, E. Editor: Adherence to Long-term Therapies: Evidence for Ac-tion, World Health Organization, Chapters 1 and Chapter 2, Magnitude of the Poor Adherence, pp.3-9 (2003).
2) New England HealthCare Institute: Thinking Outside the PillBox-A System-wide Approach to Improving Patient Medication Adherence for Chronic Disease, http://wwwnehi.net/publications/44 (2009).