ACE2 downregulation in olfactory mucosa: Eosinophilic rhinosinusitis as COVID‐19 protective factor?. Issue 9 (28th May 2021) - Marin, Concepció; Tubita, Valeria; Langdon, Cristóbal; Fuentes, Mireya; Rojas‐Lechuga, María Jesús; Valero, Antonio; Alobid, Isam; Mullol, Joaquim