1. Department of Pathology, Baylor College of Medicine, Houston, TX 77030, USA
2. Section of Dermatopathology, Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
3. Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
4. Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA