[1] MED COLL WISCONSIN,NATL BIOMED ESR CTR,MILWAUKEE,WI 53226
[2] JAGIELLONIAN UNIV,DEPT BIOPHYS,PL-31120 KRAKOW,POLAND
[3] CHRISTIE HOSP & HOLT RADIUM INST,PATERSON LAB,MANCHESTER M20 9BX,LANCS,ENGLAND
[4] PAISLEY COLL TECHNOL,DEPT CHEM,PAISLEY PA1 2BE,RENFREW,SCOTLAND