1. Risk stratification for open heart surgery: trial of the Parsonnet system in a British hospital. Issue 6861 (31st October 1992) Authors: Nashef, S. A.; Carey, F.; Silcock, M. M.; Oommen, P. K.; Levy, R. D.; Jones, M. T. Journal: BMJ Issue: Volume 305:Issue 6861(1992) Page Start: 1066 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗