PT - JOURNAL ARTICLE AU - Linda H Aiken AU - Douglas M Sloane TI - Nurses matter: more evidence AID - 10.1136/bmjqs-2019-009732 DP - 2020 Jan 01 TA - BMJ Quality & Safety PG - 1--3 VI - 29 IP - 1 4099 - http://qualitysafety.bmj.com/content/29/1/1.short 4100 - http://qualitysafety.bmj.com/content/29/1/1.full SO - BMJ Qual Saf2020 Jan 01; 29