Brett J, Staniszewska S, Mockford C, Herron-Marx S, Hughes J, Tysall C, Suleman R. Mapping the impact of patient and public involvement on health and social care research: a systematic review. Health Expectations 2012; doi: 10.1111/j.1369-7625.2012.00795.x
Edelman N, Barron D. Evaluation of public involvement in research: time for a major re-think? J Health Serv Res Policy 2015; OnlineFirst, doi:10.1177/1355819615612510