[1] UNIV LUND HOSP, DEPT INTERNAL MED, S-22185 LUND, SWEDEN
[2] UNIV LUND HOSP, DEPT NEUROCHEM, S-22185 LUND, SWEDEN
[3] UNIV LUND HOSP, DEPT FORENS MED, S-22185 LUND, SWEDEN
[4] MALMO GEN HOSP, DEPT EXPTL RES, S-21401 MALMO, SWEDEN
[5] MALMO GEN HOSP, DEPT OTORHINOLARYNGOL, S-21401 MALMO, SWEDEN