[1] KAROLINSKA HOSP, HORMONE LAB, S-10401 STOCKHOLM 60, SWEDEN
[2] KAROLINSKA INST, DEPT PHYSIOL CHEM, S-10401 STOCKHOLM, SWEDEN
[3] KAROLINSKA INST, DEPT HISTOL, S-10401 STOCKHOLM 60, SWEDEN
[4] UNIV CATTOLICA SACRO CUORE, DEPT PHARMACOL, I-00168 ROME, ITALY