DNAH5 and primary ciliary dyskinesia: Abnormal expression of DNAH5 (which has previously been linked to genetic defects) has been implicated in chronic lower airway inflammatory diseases such as primary ciliary dyskinesia (PCD), Kartagener syndrome, bronchiectasis, and chronic obstructive pulmonary disease (Hornef et al., 2006; Failly et al., 2009; Leigh et al., 2009; Lee et al., 2014; Chen et al., 2018; Qiu et al., 2018).