CLCA1 and asthma: Goblet cell gene expression analysis revealed that HDM exposure induced multiple asthma‐associated transcripts, including chloride channel calcium‐activated 1 (Clca1/Gob‐5), mucin 5, subtypes A and C, tracheobronchial/gastric (Muc5ac), intelectin 1 (Itln1), and intelectin 2 (Itln2/B).