|
Resolution: standard / high Figure 3.
Flow chart of inclusion and diagnostic work up (COPD = Chronic obstructive pulmonary
disease; OAD = obstructive airway disease; OAD = obstructive airway disease).
Schneider et al. BMC Pulmonary Medicine 2009 9:31 doi:10.1186/1471-2466-9-31 |
