[1] GOTHENBURG UNIV, DEPT PHYSIOL, S-41390 GOTHENBURG, SWEDEN
[2] GOTHENBURG UNIV, DEPT HEART & LUNG DIS, S-41390 GOTHENBURG, SWEDEN
[3] PHARMACIA AB, DEPT BIOCHEM & CLIN RES, STOCKHOLM, SWEDEN
[4] PHARMACIA AB, DEPT PEPTIDE HORMONES, STOCKHOLM, SWEDEN