Results of search strategy and selection process to identify studies for review; *Two papers reported the same study; †This included 8 studies indentified through the database searches and the two studies identified through Google and Google Scholar searches. Results of search strategy and selection process to identify studies for review; *Two papers reported the same study; †This included 8 studies indentified through the database searches and the two studies identified through Google and Google Scholar searches. Magdalena Z Raban, and Johanna I Westbrook BMJ Qual Saf 2014;23:414-421 Copyright © BMJ Publishing Group Ltd and the Health Foundation. All rights reserved.