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[2] Beers and Berkow, The Merck Manual (Whitehouse NJ: Merck Research Labs, 1999), 1410-13.
 

[3] Murray and Pizzorno, Encyclopedia of Natural Health Prima Health, (1998), 603-8.
 

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[17] Murray and Pizzorno, Encyclopedia of Natural Health Prima Health, (1998), 603-8.

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