1. From the Departments of Clinical Physiology (J.H., O.T.R.), Clinical Chemistry (M.R., P.S.), PET-Centre (O.T.R.), Physiology (M.A.) (MCA Research Laboratory), University of Turku, Finland; Medical Centre Mehiläinen (T.I., P.S., J.H. O.T.R.), Turku, Finland; Leiras Finland, Inc. (J.E.), Turku, Finland; and Laboratory of Atherosclerosis Genetics, Department of Clinical Chemistry, Centre for Laboratory Medicine (T.L., A.H.), Tampere University Hospital and University of Tampere, Finland.