PT - JOURNAL ARTICLE AU - Sarah Haessler TI - The Hawthorne effect in measurements of hand hygiene compliance: a definite problem, but also an opportunity AID - 10.1136/bmjqs-2014-003507 DP - 2014 Dec 01 TA - BMJ Quality & Safety PG - 965--967 VI - 23 IP - 12 4099 - http://qualitysafety.bmj.com/content/23/12/965.short 4100 - http://qualitysafety.bmj.com/content/23/12/965.full SO - BMJ Qual Saf2014 Dec 01; 23