TPH1 and allergic asthma: Accordingly, to better understand the contribution of B cell subsets, Tph cell subsets and Tfh cell subsets to the production of IgE antibodies in response to allergens and to elucidate their roles in allergic immune responses, we analyze circulating B cell subsets, Tph cell subsets and Tfh cell subsets in children with allergic asthma using multicolor flow cytometry in the current study.