1. Cardioselective beta-blockers for chronic obstructive pulmonary disease: a meta- analysis 
S.R Salpeter, T.M Ormiston, E.E Salpeter, P.J Poole, C.J Cates 
Respiratory Medicine 
Volume 97, Issue 10, Pages (October 2003)
DOI: /S (03)

2. Figure 1
FEV1 treatment effects for single-dose and continued treatment studies.
Respiratory Medicine  , DOI: ( /S (03) )

3. Figure 2
FEV1 treatment effects after beta2-agonists for single-dose and continued treatment studies.
Respiratory Medicine  , DOI: ( /S (03) )