hospitals and school of medicine, rue Gabrielle-Perret-Gentil 4, 1211 Geneva 14, Switzerland; Division of hematology, department of medical specialties, university hospitals and school of medicine, 1211 Geneva 14, Switzerland.
1 Division of immunology and allergy, department of medical specialties, Geneva university hospitals and school of medicine, rue Gabrielle-Perret-Gentil 4, 1211 Geneva 14, Switzerland; Division of hematology, department of medical specialties, university hospitals and school of medicine, 1211 Geneva 14, Switzerland.