[1] W LONDON HOSP,LONDON,ENGLAND
[2] CLAUDE NICOL CTR,BRIGHTON,ENGLAND
[3] ST MARKS HOSP,LONDON EC1V 2PS,ENGLAND
[4] DRUG ADDICT STUDY & CITY CLIN,EDINBURGH,ENGLAND
[5] UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND
[6] ST GILES HOSP,LONDON SE5 7RN,ENGLAND
[7] ST STEPHENS HOSP,LONDON SW10 9TH,ENGLAND
[8] WESTMINSTER HOSP,LONDON SW1P 2AP,ENGLAND
[9] MIDDLESEX SCH MED,LONDON,ENGLAND