1. Departments of Heart and Lung Diseases (C.N., B.-M.L., P.B., A.H.), Goteborg University, S-413 45 Goteborg, xsSweden
2. Wallenberg Laboratory (C.N., B.-M.L., P.B., A.H.), Goteborg University, S-413 45 Goteborg, Sweden
3. Histology (E.J.), Goteborg University, S-413 45 Goteborg, Sweden
4. Pharmacology (E.E.), Goteborg University, S-413 45 Goteborg, Sweden
5. Pennington Biomedical Research Center, Louisiana State University (D.A.Y.), Baton Rouge, Louisiana 70808