[1] UNIV BASEL,CH-4051 BASEL,SWITZERLAND
[2] UNIV VIRGINIA,CHARLOTTESVILLE,VA 22903
[3] AMER UNIV,WASHINGTON,DC 20016
[4] UNIV BONN,D-5300 BONN 1,FED REP GER
[5] CENS,F-91190 GIF SUR YVETTE,FRANCE
[6] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305