ISTITUTO SUPERIORE DELLA SANITÀ (ITALIA)
US ARMY natick research center (U.S.A.)
E.P.A. ENVIROMENT PROTECTION AGENCY (U.S.A.)
BETZ-CONVERSE - MURDOCK (U.S.A.)
VILLANOVA UNIVERSITY (U.S.A.)
INSTITUT PASTEUR (FRANCIA)
MARINE TESTING INSTITUTE (U.S.A.)
HOKKAIDO UNIVERSITY (GIAPPONE)
COLORADO STATE UNIVERSITY
COLLEGE OF VETERINARY MEDICINE AND BIOMEDICAL SCIENZE (USA

UNIVERSITY OF MIAMI
UNIVERSITA' DI PAVIA
US TESTING COMPANY (U.S.A.)
UNIVERSITY OF HAWAII (U.S.A.)
CEDAR GROBE LABS (U.S.A.)
A.S.L. RM 1 (ITALIA)
A.S.L. RM 30 (ITALIA)
UNIVERSITA' DI ROMA
A.S.L. RM 1 (ITALIA)
A.S.L. RM 30 (ITALIA)

UNIVERSITY OF WISCONSIN food research institute.
STATE OF WISCONSIN department of natural resources
STATE OF MASSACHUSSETTS
MARIST RESEARCH INSTITUTE (U.S.A.)
JAPANESE FOOD AND HYGENE ASSOCIATIONS
UNIVERSITA' DI ROMA
AERONAUTICA MILITARE ITALIANA
Divisione Aerea Studi, Ricerche e Sperimentazioni (ITALIA)
WATER BOARD (AUSTRALIA)
ENTE FERROVIE DELLO STATO (ITALIA)
NATIONAL TESTING LAB. (U.S.A.)
GS-TUV (GERMANIA