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  1. Nelson Vergel

    Circadian variation in systemic hormone levels in healthy men
  2. Nelson Vergel

    Why Is Blue Light before Bedtime Bad for Sleep?

    "What happens in the body when our eyes are exposed to blue light on electronic devices? Chang: Recent studies have shown that short-wavelength [blue] light has a greater effect on phase shifting the circadian clock and on melatonin suppression. In 2014 my colleagues and I examined the effects...
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