1. Department of Immunology, University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA.
2. Department of Infectious, Parasitic and Immunomediated Diseases, Istituto Superiore di Sanitá, 00161 Rome, Italy.
3. Graduate School of Biomedical Sciences, University of Texas, Houston, TX 77030, USA.
4. Division of Rheumatology, Department of Clinical Medicine and Therapy, University La Sapienza of Rome, 00161 Rome, Italy.
5. Department of Biostatistics, University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA.
6. First Department of Internal Medicine, Kansai Medical University, Osaka 579-8506, Japan.
7. Department of Melanoma Medical Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA.
8. Department of Dermatology, University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA.