Authors: Linda H Aiken; Douglas Sloane; Peter Griffiths; Anne Marie Rafferty; Luk Bruyneel; Matthew McHugh; Claudia B Maier; Teresa Moreno-Casbas; Jane E Ball; Dietmar Ausserhofer; Walter Sermeus Journal: BMJ Qual Saf Date: 2016-11-15 Impact factor: 7.035