_:vb50941690 "An intrinsic asthma that is characterized by narrowing of the airways during or shortly after exercise."^^ . _:vb50941690 . _:vb50941690 . _:vb50941690 "url:https://pubmed.ncbi.nlm.nih.gov/29631730/"^^ . _:vb50941690 . _:vb50941690 .