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The physiological mechanism of penile erection involves the release of nitric oxide (NO) in the cavernous body with sexual stimulation. s
cheap viagra free shippingNitric oxide activates the enzyme guanylate cyclase, which leads to an increase in the level of cyclic guanosine monophosphate (cGMP), relaxation of smooth muscles of the cavernous body, and increased blood flow in the penis.
Фрахтовый рынок река-море 2020/2021. Перспективы и возможности.
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