아무도 논의하지 않는 현명한 비아그라 비법

PDE3 is involved answerable for cardiac contractility. Sildenafil is only about ten-fold as strong for PDE5 when compared with PDE6, an enzyme located in the retina which can be linked to the phototransduction pathway from the retina. This decrease selectivity is considered the basis for abnormalities linked to colour eyesight [see Pharmacodynamics

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