1. Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine and Magee Womens Research Institute, Pittsburgh, PA 15213, USA
2. Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
3. Present address: Cancer Gene Therapy Group, Finnish Institute for Molecular Medicine, University of Helsinki, Haartmaninkatu 8, 00290 Helsinki, Finland
4. Karolinska Cancer Center, Department of Oncology-Pathology and Karolinska University Hospital, 171 76 Solna, Stockholm, Sweden
5. Present address: Department of Biochemistry, University of Medicine and Pharmacy, Bd 1 Mai, nr 62, 200322 Craiova, Romania