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  1. Nelson Vergel

    What Test Diagnoses the Real Cause of Erectile Dysfunction? The Penile Doppler Triplex Explained

    Curated By Nelson Vergel | ExcelMale.com | Updated August 2026 Aging changes the penile arteries and erectile tissue on its own, separate from your metabolic health. That is the part most men are never told. Erection pills are effective when used correctly, but they treat the symptom while...
  2. Nelson Vergel

    International Index of Erectile Function (IIEF) Questionnaire- What's Your Score?

    The 15-question International Index of Erectile Function (IIEF) Questionnaire is a validated, multi-dimensional, self-administered investigation that has been found useful in the clinical assessment of erectile dysfunction and treatment outcomes in clinical trials. A score of 0-5 is awarded...
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