JAK2 and chronic idiopathic urticaria: Within the remaining patients, one suffered from eosinophilic gastroenteritis, two from asthma (all responded to steroids), two from atypical myeloproliferative syndrome (one was also positive to JAK2-V617F mutation and both responded to hydroxyurea therapy), one from dermatomyocytis, one from bronchiectasis, and one from chronic idiopathic urticaria.