1. UK NEQAS for Leucocyte ImmunophenotypingSheffield Teaching Hospitals Sheffield UK
2. Department of Oncology and Metabolism, Faculty of Medicine, Dentistry and HealthUniversity of Sheffield Sheffield UK
3. Clinical Flow Cytometry Laboratory, Laboratory of PathologyCCR, NCI, NIH Bethesda Maryland
4. Department of Haematology and Flow CytometrySynlab Suisse SA Bioggio Switzerland
5. Department of HematopathologyMD Anderson Cancer Center Houston Texas
6. HMDS, Department of HaematologySt. James's Institute of Oncology Leeds UK
7. Flow Cytometry LaboratoryWaikato Hospital Hamilton New Zealand
8. Department of Flow and Image CytometryRoswell Park Cancer Institute Buffalo New York
9. Hematopathology LaboratoryTata Memorial Center Mumbai Maharashtra India
10. Flow Cytometry Laboratory, Department of Clinical PathologyCHLO S. Francisco Xavier Hospital Lisbon Portugal
11. Department of HaematologySheffield Teaching Hospitals NHS Foundation Trust Sheffield UK