1. Department of Haematology; Hospital Universitario de Canarias; Santa Cruz de Tenerife Spain
2. Department of Internal Medicine; Universidad de La Laguna; Santa Cruz de Tenerife Spain
3. Department of Haematology; Hospital Universitario de Gran Canaria Dr. Negrín; Las Palmas de Gran Canaria Spain
4. Department of Haematology; Hospital Universitario Insular de Gran Canaria; Las Palmas de Gran Canaria Spain
5. Department of Haematology; Hospital Universitario Nuestra Señora de La Candelaria; Santa Cruz de Tenerife Spain