1. Instituto de Estudios de Mastocitosis de Castilla La Mancha; Toledo Spain
2. Red Española de Mastocitosis; Toledo Spain
3. Section of Haematology; Azienda Ospedaliera Universitaria Integrata and University of Verona; Verona Italy
4. Department of Pathology; School of Medicine; Stanford University; Stanford CA USA
5. Servicio General de Citometría, Centro de Investigación del Cáncer (IBMCC-CSIC/USAL; IBSAL) and Departamento de Medicina; Universidad de Salamanca; Salamanca Spain
6. Allergy Service; Azienda Ospedaliera Universitaria Integrata and University of Verona; Verona Italy
7. Section of Pathological Anatomy; Azienda Ospedaliera Universitaria Integrata and University of Verona; Verona Italy
8. Department of Pathology; Hospital Virgen de la Salud; Toledo Spain