In other words, AF‐sensitized patients display IgE to Asp f 1 and Asp f 2 even if they are not affected by ABPA, but the detection of Asp f 4 IgE in addition to Asp f 1 and/or Asp f 2 supports the diagnosis of ABPA [32, 58, 59]. The gene discussed is IGHE; the disease is atrial fibrillation.