Search results
Systematic Reviews > 2017 > 6 > 1 > 1-12
BMC Medicine > 2016 > 14 > 1 > 1-12
BMC Medical Research Methodology > 2015 > 15 > 1 > 1-7
Journal of Clinical Epidemiology > 2008 > 61 > 6 > 521-524
Health Care Analysis > 2003 > 11 > 1 > 69-92