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(1) Delayed ejaculation was diagnosed in patients who had undergone sufficient sexual arousal, sexual stimulation, and hard erection for more than 30 min, but still could not complete ejaculation and thus needed medical guidance and help. (2) Insufficient ejaculation was diagnosed in patients who had a final semen volume of less than 0.5 ml (without losing any) after ejaculation was completed, and still had the ejaculation feeling and needed to collect semen again.

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