PT - JOURNAL ARTICLE AU - Rocco Friebel AU - Adam Steventon TI - Composite measures of healthcare quality: sensible in theory, problematic in practice AID - 10.1136/bmjqs-2018-008280 DP - 2019 Feb 01 TA - BMJ Quality & Safety PG - 85--88 VI - 28 IP - 2 4099 - http://qualitysafety.bmj.com/content/28/2/85.short 4100 - http://qualitysafety.bmj.com/content/28/2/85.full SO - BMJ Qual Saf2019 Feb 01; 28