title: [Secondary polycythemia due to obstructive sleep apnea hypopnea syndrome: a case report].
authors.forename: Li-yan
authors.initials: LY
authors.lastname: Liang
authors.forename: Feng-kui
authors.initials: FK
authors.lastname: Zhang
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D011086:Polycythemia / Q000209:etiology*; D020181:Sleep Apnea, Obstructive / Q000150:complications*