1. The Hiram C. Polk Jr., MD, Department of Surgery, University of Louisville School of Medicine, Louisville, USA
2. Department of Histology, School of Medicine, Autonomous University of Nuevo León, Monterrey, N.L. México
3. Department of Molecular Genetics, Northeast Biomedical Research Center, Mexican Institute of Social Security (IMSS), Monterrey, N.L. México
4. Department of Microbiology and Immunology, Institute for Cellular Therapeutics, University of Louisville, Louisville, USA
5. James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, USA