[1] ROYAL COLL SURGEONS ENGLAND,LONDON WC2A 3PN,ENGLAND
[2] CONFEDERAT EUROPEAN SCIENTISTS PAEDIAT,LUXEMBOURG,LUXEMBOURG
[3] ASHFORD HOSP,MIDDLESEX,ENGLAND
[4] UNIV AUTONOMA BARCELONA,HOSP GEN UNIV VALL DE HEBRON,DEPT MED,BARCELONA,SPAIN
[5] HOP LA PITIE SALPETRIERE,PARIS,FRANCE
[6] UNIV GENEVA,HOP CANTONAL,CH-1211 GENEVA 4,SWITZERLAND
[7] UNIV GENEVA,SCH MED,DEPT MED,CH-1211 GENEVA 4,SWITZERLAND
[8] UNIV LONDON,INST NEUROL,LONDON,ENGLAND
[9] UNIV NOTTINGHAM,NOTTINGHAM NG7 2RD,ENGLAND