Richard J Ablin1
, Francesco M Marincola2
and Pier Giorgio Natali3 
1
Departments of Immunobiology and Pathology, University of Arizona College of Medicine, Arizona Cancer Center and BIO5 Institute, Tucson, AZ 85724, USA
2
Infectious Disease and Immunogenetics Section (IDIS), Department of Transfusion Medicine, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA
3
Immunology and Molecular Pathology Laboratories, "Regina Elena" National Cancer Institute, Rome, Italy