Affiliation: | 1. GlaxoSmithKline Pharmaceuticals, 2301 Renaissance Boulevard, King of Prussia, PA 19406, USA;2. AstraZeneca Pharmaceuticals, Global Clinical Information Science, Alderley Park, Macclesfield, UK;3. Pharmaceutical Statistics Medical Statistics Group, University of Sheffield, Regent Court, 30 Regent Street, Sheffield S1 4DA, UKMedical Statistics Group, University of Sheffield, Regent Court, 30 Regent Street, Sheffield S1 4DA, UK |