1. Temporal growth and geographic variation in the use of laboratory tests by NHS general practices: using routine data to identify research priorities
by John Busby, Knut Schroeder, Wolfram Woltersdorf, Jonathan AC Sterne, Yoav Ben-Shlomo, Alastair Hay, and William Hollingworth
BJGP
Volume 63(609):e256-e266
April 1, 2013
©2013 by British Journal of General Practice

2. Regional variation in test-ordering behaviour, stratified by high, median, and low variance.
Regional variation in test-ordering behaviour, stratified by high, median, and low variance. For H1, H2, no procedures were observed in some regions. The lowest bar for this procedure refers to a notional rate of 0.1 procedures per person-years.
John Busby et al. Br J Gen Pract 2013;63:e256-e266
©2013 by British Journal of General Practice