1. Department of Immunology, Faculty of Biology and Environment ProtectionNicolaus Copernicus University Toruń Poland
2. Department of Dermatology, Comprehensive Cancer Center, Cancer Chemoprevention ProgramUniversity of Alabama at Birmingham Birmingham Alabama
3. Laboratory Service of the VA Medical Center Birmingham Alabama
4. Department of Medical Biology, Faculty of Biology and Environment ProtectionNicolaus Copernicus University Toruń Poland