1. Effect of β blockers in treatment of chronic obstructive pulmonary disease: a retrospective cohort study. (10th May 2011) Authors: Short, Philip M; Lipworth, Samuel I W; Elder, Douglas H J; Schembri, Stuart; Lipworth, Brian J Journal: BMJ Issue: Volume 342(2011) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗