1. Dahl-Chase Diagnostic Services in Bangor; Maine USA
2. Institute of Hematology and Blood Transfusion; Prague Czech Republic
3. Laboratory Medicine Program; Toronto General Hospital; Toronto Canada
4. Département d'Hématologie et d'Immunologie Biologiques Hôpital Henri Mondor; Créteil France
5. Federico II University and CEINGE Institute in Naples; Naples Italy