1. Service of Haematology Hospital das Clinicas da Faculdade de Medicina da São Paulo; Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo; São Paulo Brazil
2. Paediatric Service of Haematology/Children Institute; Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo; São Paulo Brazil
3. Department of Psychology; Laurentian University; Sudbury ON Canada
4. School of Rural and Northern Health; Laurentian University; Sudbury ON Canada
5. Paediatric Thrombosis and Haemostasis Program; Division of Haematology/Oncology; Department of Paediatrics; The Hospital for Sick Children; University of Toronto; Toronto ON Canada