Effect of β blockers in treatment of COPD: a retrospective cohort study
{"Image DocumentName": "Effect of \u03b2 blockers in treatment of COPD: a retrospective cohort study", "Image ImageDescription": "Short PM, Lipworth SI, et al. BMJ We found that \uf062 blocker use was associated with a 22 % reduction in mortality.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}