1. Department of Gastrointestinal Medical Oncology, Oncoclínicas, Belo Horizonte, Brazil
2. Department of Gastrointestinal Medical Oncology, Oncoclínicas, São Paulo, Brazil
3. Department of Gastrointestinal Medical Oncology, Oncoclínicas, Rio de Janeiro, Brazil
4. Department of Gastrointestinal Medical Oncology, Oncoclínicas, Porto Alegre, Brazil
5. Oncoclínicas Precision Medicine, São Paulo, Brazil
6. Department of Medicine, Division of Hematology and Oncology, Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA