1. Myriad Genetics, Inc , Salt Lake City, UT, USA
2. Myriad Genetic Laboratories, Inc , Salt Lake City, UT, USA
3. Department of Gastrointestinal Oncology, Moffit Cancer Center , Tampa, FL, USA
4. Departments of Cancer Epidemiology and Gastrointestinal Oncology, Moffit Cancer Center , Tampa, FL, USA