08:59 02/01/2026
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Nguồn tham khảo
  1. Schiavi, R. C., & Schreiner-Engel, P. (1988). Nocturnal penile tumescence in healthy aging men. Journal of gerontology43(5), M146–M150. https://doi.org/10.1093/geronj/43.5.m146
  2. Holland, K. (2025, July 18). Everything you need to know about Morning Wood. Retrieved from https://www.healthline.com/health/mens-health/morning-wood
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