1. Evidence based medicine: what it is and what it isn’t;Sackett;BMJ.,1996
2. Meta-analysis: principles and procedures;Egger;BMJ.,1997
3. Traditional reviews, meta-analyses and pooled analyses in epidemiology;Blettner;Int J Epidemiol.,1999
4. Protocol for prospective collaborative overviews of major randomized trials of blood-pressure lowering treatments;J Hypertens.,1998
5. Effects of ACE inhibitors, calcium antagonists and other blood pressure lowering drugs: results of prospectively designed overviews of randomised trials;Lancet.,2000