title: Polysomnography necessitates experimental control of the "First Night Effect".
authors.forename: J C
authors.initials: JC
authors.lastname: Rains
mesh_terms: D020773:Headache Disorders / Q000503:physiopathology*; D017286:Polysomnography / Q000009:adverse effects*; D012890:Sleep; D013997:Time Factors