1. Department of Dermatology and Allergy Centre Odense Research Centre for Anaphylaxis (ORCA) Odense University Hospital Odense Denmark
2. Department of Haematology Odense University Hospital Odense Denmark
3. Department of Gastroenterology Odense University Hospital Odense Denmark
4. Department of Endocrinology Odense University Hospital Odense Denmark
5. Department of Dermatology and Allergy Interdisciplinary Mastocytosis Center Charité Charité‐Universitätsmedizin Berlin Berlin Germany
6. Department of Pathology Odense University Hospital Odense Denmark