비아그라는 무엇을 의미합니까?

At solitary oral doses of one hundred mg and 200 mg, transient dose-associated impairment of shade discrimination was detected using the Farnsworth-Munsell a hundred-hue exam, with peak results near the time of peak plasma amounts. This locating is according to the inhibition of PDE6, which is linked to phototransduction during the retina.Some peop

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