1. The Authors Respond. Issue 4 (July 2019) Authors: Berrie, Laurie; Ellison, George T.H.; Norman, Paul D.; Baxter, Paul D.; Feltbower, Richard G.; Tennant, Peter W. G.; Gilthorpe, Mark S. Journal: Epidemiology Issue: Volume 30:Issue 4(2019) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗