[1] UNIV MUNICH, INST CLIN CHEM & CLIN BIOCHEM, D-8000 MUNICH 2, GERMANY
[2] UNIV LUND, MALMO GEN HOSP, DEPT CLIN CHEM, S-21401 MALMO, SWEDEN
[3] UNIV OULU, DEPT PATHOL, SF-90220 Oulu 22, FINLAND
[4] UNIV TOKUSHIMA, SCH MED, FAC ENZYME RES, TOKUSHIMA 770, JAPAN
[5] UNIV MUNICH, INST PHYSIOL CHEM, PHYS BIOCHEM & CELL BIOL, D-8000 MUNICH 2, GERMANY
[6] NAGOYA CITY UNIV, SCH MED, DEPT BIOCHEM, NAGOYA, AICHI 467, JAPAN
[7] EDVARD KARDELJ UNIV, J STEFAN INST, DEPT BIOCHEM, YU-61000 LJUBLJANA, YUGOSLAVIA
[8] NIPPON DENT UNIV, NIIGATA FAC, DEPT ORAL BIOCHEM, NIIGATA 851, JAPAN