1. Pharmacy Department, Drug Design group, University of Groningen, Deusinglaan 1, 9700 AV Groningen, Netherlands.
2. Labcyte Inc., 170 Rose Orchard Way, San Jose, CA 95134, USA.
3. Hit Discovery, Discovery Sciences, IMED Biotech Unit, AstraZeneca, Mölndal, Gothenburg SE-43183, Sweden.