- INFN (Sezioni di Bologna, Milano-Bicocca, Padova, Pavia, Perugia, Pisa, Trieste)
- UK: Imperial College London; U.Liverpool
- PL: Krakow INP Pan
- USA: Cornell U.; Northwestern U.; Regis U.; Virginia U.
- PRC: Shanghai Jiao Tong U.
- CH: PSI Villigen; U.Zurich; ETH Zurich
- GR: Demokritos INPP Athens
- D: Johannes Gutenberg Univ. of Mainz
- CERN
- + other individual colleagues