1University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway, NJ 08854-5635, USA.
2Biometrics, Pfizer Central Research, Groton
3Biometrics, Pfizer Central Research, Sandwich, UK
4Marketing Research, Pfizer Pharmaceuticals Group, New York
5Outcomes Research, Pfizer Pharmaceuticals Group, New York, USA