Nocturnal penile erections: A retrospective study of the role of RigiScan in predicting the response to sildenafil in erectile dysfunction patients.

J Adv Res · 2018 · PMC6090085 · PMID 30109146

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did not reach statistical significanceno p-value reported

showed that the number of RigiScan NPTR episodes increased after intake of sildenafil, but the recorded values did not reach statistical significance [23] .

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