Table 1

Risk of bias within studies
Source Randomization Allocation concealment Blinding of participants & personnel Blinding of outcome assessment Incomplete data outcome Selective reporting
Dugger et al. 2010 Low risk Low risk Low risk Unclear risk Unclear risk Unclear risk
Hewitt et al., 2010 Low risk Low risk Low risk Low risk Unclear risk Unclear risk
Lowder et al., 2010 Low risk Low risk Low risk Unclear risk Unclear risk Unclear risk
Pastva et al., 2005 Low risk Low risk Low risk Unclear risk Unclear risk Unclear risk
Pastva et al., 2004 Low risk Low risk Low risk Unclear risk Unclear risk Unclear risk
Silva et al., 2010 Low risk Low risk Low risk Low risk Unclear risk Unclear risk
Vieira et al., 2011 Low risk Low risk Low risk Low risk Low risk Unclear risk
Vieira et al., 2009 Low risk Low risk Low risk Low risk Low risk Unclear risk
Vieira et al., 2008 Low risk Low risk Low risk Low risk Low risk Unclear risk
Vieira et al., 2007 Low risk Low risk Low risk Low risk Low risk Unclear risk

Luks et al.

Luks et al. BMC Pulmonary Medicine 2013 13:24   doi:10.1186/1471-2466-13-24

Open Data