[1] Baylor Coll Med, Airways Clin Res Ctr, Sect Pulm & Crit Care Med, Houston, TX 77030 USA
[2] GlaxoSmithKline, US Med Affairs, Res Triangle Pk, NC USA
[3] Precise Approach Ltd, Brentford, Middx, England
[4] GlaxoSmithKline, Assignment, Brentford, Middx, England
[5] GlaxoSmithKline, Stat, Brentford, Middx, England
[6] GlaxoSmithKline, R&D, Res Triangle Pk, NC USA
[7] Univ N Carolina, Lnternal Med Div Pulm & Crit Care Med, Chapel Hill, NC 27515 USA
[8] Univ Kentucky, Coll Publ Hlth, Dept Prevent Med & Environm Hlth, Lexington, KY USA