1. Research Centre for Endocrinology and Metabolism (K.W., K.S., V.W., O.I., C.O., J.-O.J.), Sahlgrenska University Hospital, Göteborg SE-413 45, Sweden
2. Department of Medicine (X.-D.P., S.P., L.F., R.K.), Section of Endocrinology and Metabolism, University of Illinois, Chicago, Illinois 60612
3. Department of Medicine (J.-L.L.), McGill University, Montréal QCH3A1A1, Canada
4. AstraZeneca R & D (M.U., H.W.), SE-43183 Mölndal, Sweden