_:vb50943291 . _:vb50943291 . _:vb50943291 . _:vb50943291 . _:vb50943291 "url:https://www.ncbi.nlm.nih.gov/pubmed/19200523"^^ . _:vb50943291 "A primary ciliary dyskinesia that is characterized by reduced exercise tolerance, chronic wet cough, recurrent respiratory infections, bronchiectasis, and nasal symptoms, and has_material_basis_in homozygous mutation in the RSPH9 gene on chromosome 6p21."^^ . _:vb50943291 .