Before she reached elementary-school age, Brooke Monday had chicken pox five times and battled an infection that spread cold sores from her mouth down into her stomach.

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Q. Smoking for years left me with fine lines and deep wrinkles around my mouth. What moisturizer should I use to decrease them? — Hrefna A. Don’t expect too much from a moisturizer.

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The experimental medication, called tasimelteon, works like melatonin and restores normal sleep patterns, researchers say. An experimental drug that mimics the effects of the hormone melatonin can reset the body’s circadian rhythms, bringing relief to jet-lagged travelers and night-shift workers, researchers reported Monday.

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