C1QL1 and cystic fibrosis: As for other molecules involved in the early phase of CF elimination, C1q‐like molecule 1 (C1ql1) derived from CFs acting anterogradely on cell adhesion G‐protein‐coupled receptor 3 (Bai3) in PCs is reported to promote CF elimination from P7 and the strengthening and maintenance of the strongest CF (Kakegawa et al. 2015).