1. Bristol Institute for Transfusion Sciences; NHS Blood and Transplant; Bristol UK
2. International Blood Group Reference Laboratory; NHS Blood and Transplant; Bristol UK
3. Red Cell Immunohaematology Laboratory; NHS Blood and Transplant; Bristol UK
4. Blood Transfusion Laboratory; Southmead Hospital; Bristol UK
5. Red Cell Immunohaematology Laboratory; NHS Blood and Transplant; London UK