REAL-LIFE INSIGHTS AND CLINICAL CHARACTERISTICS OF HEREDITARY ALPHA TRYPTASEMIA IN ANAPHYLACTIC PATIENTSAuthors: Loli-Ausejo D1,2,4*, Gonzalez-Matamala MF1,2*, Martí D3, Ruano-Zaragoza M1,2,4, Mir-Ihara P1,2,4, Solis-Ynga K1,2, Lara R3, Bartra J1,2,4, Pascal M2,3,4**, Muñoz-Cano R 1,2,4**1. Department of Allergy, Hospital Clinic Barcelona, Universitat de Barcelona (UB), Barcelona, Spain.2. Clinical and Experimental Respiratory Immunoallergy (IRCE), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.3. Department of Immunology, Hospital Clínic Barcelona, Universitat de Barcelona (UB), Barcelona, Spain.4. Redes de Investigación Cooperativa Orientadas a Resultados en Salud (RICORS), Red de Enfermedades Inflamatorias (REI), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.* Loli-Ausejo D and Gonzalez-Matamala MF contributed equally to this work** Pascal M and Muñoz-Cano R contributed equally to this workCorrespondance : rmunoz@clinic.cat