Cough headache and the competency of jugular venous valves.
Knappertz
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VA
D003371:Cough / Q000503:physiopathology*; D006261:Headache / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging; D013577:Syndrome; D018615:Ultrasonography, Doppler, Color; D014636:Valsalva Maneuver; D014654:Vascular Patency