1. Pfizer Analytical Research Centre, Ghent University, Krijgslaan 281-S4 Bis, B-9000 Ghent, Belgium, Research Analytics, Pfizer Global R & D, Ramsgate Road, Sandwich, Kent CT13 9NJ, U.K., and Analytical R&D, Pfizer Global R & D, Ramsgate Road, Sandwich, Kent CT13 9NJ, U.K.