1. Biotherapeutics Pharmaceutical Sciences Research and Development; Pfizer Inc.; Andover, MA USA
2. Biotherapeutics Pharmaceutical Sciences Research and Development; Pfizer Inc.; Chesterfield, MO USA
3. Current affiliation for Patrick M Buck is Stephen M. Ross School of Business; University of Michigan; Ann Arbor, MI USA
4. Biotherapeutics Analytical Research and Development; Pfizer Inc.; Andover, MA USA
5. Current affiliation for Tami R Conley is Catalent Pharma Solutions; Morrisville, NC USA
6. Biotherapeutics BioProcess Research and Development; Pfizer Inc.; Chesterfield, MO USA