Eosinophils and activation markers after allergen challenge – a pilot study for three‐dimensional analysis in the bronchial mucosa. Issue 9 (4th June 2021) - Prenzler, Frauke; Tschernig, Thomas; Sewald, Katherina; Veres, Tibor Z; Rittinghausen, Susanne; Krug, Norbert; Hohlfeld, Jens M.; Braun, Armin