[1] Pfizer Inc, Internal Med Res Unit, 1 Portland St, Cambridge, MA USA
[2] Pfizer Inc, Early Clin Dev, Biostat, 1 Portland St, Cambridge, MA USA
[3] Pfizer R&D UK Ltd, Early Clin Dev, Biostat, Ramsgate Rd, Sandwich, Kent, England
[4] Pfizer Inc, Biomed Design, 1 Portland St, Cambridge, MA USA
[5] Pfizer Inc, Biomed Design, 1 Burtt Rd, Andover, MA USA
[6] Pfizer Inc, Drug Safety Res & Dev, 1 Portland St, Cambridge, MA USA