11.11  References

Clarke 2006  
Clarke M, Hopewell S, Juszczak E, Eisinga A, Kjeldstrøm M. Compression stockings for preventing deep vein thrombosis in airline passengers. Cochrane Database of Systematic Reviews 2006, Issue 2. Art No: CD004002.

Deeks 2001  
Deeks JJ, Altman DG. Effect measures for meta-analysis of trials with binary outcomes. In: Egger M, Davey Smith G, Altman DG (editors). Systematic Reviews in Health Care: Meta-analysis in Context (2nd edition). London (UK): BMJ Publication Group, 2001.

Engels 2000  
Engels EA, Schmid CH, Terrin N, Olkin I, Lau J. Heterogeneity and statistical significance in meta-analysis: an empirical study of 125 meta-analyses. Statistics in Medicine 2000; 19: 1707-1728.

GRADE Working Group 2004  
GRADE Working Group. Grading quality of evidence and strength of recommendations. BMJ 2004; 328: 1490-1494.

Hind 2007  
Hind D, Booth A. Do health technology assessments comply with QUOROM diagram guidance? An empirical study. BMC Med Res Methodol 2007; 7: 49.

Lewis 2001  
Lewis S, Clarke M. Forest plots: trying to see the wood and the trees. BMJ 2001; 322: 1479-1480.

Liberati 2009  
Liberati A, Altman DG, Tetzlaff J, Mulrow C, Gotzsche PC, Ioannidis JP, Clarke M, Devereaux PJ, Kleijnen J, Moher D. The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration. PLoS Medicine 2009; 6: e1000100.