[1] CTR DIS CONTROL,ATLANTA,GA 30333
[2] UNIV MARYLAND,COLLEGE PK,MD 20742
[3] INST PASTEUR,F-75724 PARIS 15,FRANCE
[4] UNIV MUNICH,D-8000 MUNICH 2,FED REP GER
[5] NIDR,BETHESDA,MD 20205
[6] VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061
[7] UNIV WESTERN ONTARIO,LONDON N6A 3K7,ONTARIO,CANADA
[8] UNIV KIEL,D-2300 KIEL 1,FED REP GER
[9] UNIV CALIF DAVIS,DAVIS,CA 95616
[10] UNIV BONN,D-5300 BONN,FED REP GER