1. Instituto de Ensino e Pesquisa Hospital Sírio‐Libanês São Paulo Brazil
2. Department of Oral Surgery and Pathology School of Dentistry Universidade Federal de Minas Gerais Belo Horizonte Brazil
3. Bone Marrow Transplant Unit Hospital Sírio‐Libanês São Paulo Brazil
4. Pediatric Hematology‐Oncology Unit ITACI/ICR‐HCFMUSP São Paulo Brazil
5. Department of Hematology, Hemotherapy and Cell Therapy USP São Paulo Brazil
6. Department of Hematology NHS‐BT University of Oxford Oxford UK