_:vb50941495 "A syndrome that has_material_basis_in inherited extra copies of the alpha tryptase gene and that is characterized by high blood tryptase levels."^^ . _:vb50941495 . _:vb50941495 . _:vb50941495 . _:vb50941495 . _:vb50941495 "url:https://rarediseases.info.nih.gov/diseases/13193/hereditary-alpha-tryptasemia-syndrome"^^ . _:vb50941495 "url:https://pubmed.ncbi.nlm.nih.gov/30007465/"^^ .