[1] UNIV NOTTINGHAM,DEPT PHARMACEUT SCI,BIOPHYS & SURFACE ANAL LAB,NOTTINGHAM NG7 2RD,ENGLAND
[2] SMITHKLINE BEECHAM PHARMACEUT,DEPT NEUROSCI,HARLOW CM19 5AD,ESSEX,ENGLAND
[3] SMITHKLINE BEECHAM PHARMACEUT,DEPT ANALYT SCI,BETCHWORTH RH3 7AJ,SURREY,ENGLAND