1. Process Research & Development; F. Hoffmann-La Roche Ltd.; CH-4070 Basel Switzerland
2. Institute of Biochemistry; Ernst-Moritz-Arndt-Universität Greifswald; Felix-Hausdorff-Str. 4 17487 Greifswald Germany
3. Pharmaceutical Research and Early Development; F. Hoffmann-La Roche Ltd.; CH-4070 Basel Switzerland
4. Institute of Pharmaceutical Sciences; Albert-Ludwigs-Universität Freiburg; Albertstrasse 25 79104 Freiburg Germany