1. Department of Clinical Sciences (O.L., M.S.W., J.V., B.A.), Lund University, SE-221 84 Lund, Sweden
2. National Research Council (A.M.), I-35127 Padua, Italy
3. Department of Biomedical Sciences (C.F.D.), Copenhagen University, DK-2300 Copenhagen, Denmark
4. Merck A/S (R.D.C.), DK-2600 Glostrup, Denmark