Skip to main content
. 2014 Dec 9;2014(12):CD010468. doi: 10.1002/14651858.CD010468.pub2
Study Reason for exclusion
AACN 2012 Commentary paper on Jones 2012
Backman 2001 Observational study
Backman 2010 Prospective cohort study with retrospective reference group
Bagger 2006 Observational study
Garrouste‐Orgeas 2012 Time‐series design
Hale 2010 Observational study
Hayes 2008 Observational study
MacDonald 2011 Observational study
Robson 2008 Observational study