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Heather S. Oliff, PhD, principal in the Scientific Consulting Group, LLC, holds a doctorate in pharmacology and toxicology. Among her publications she has authored over 300 reviews and summaries of clinical trials and systematic reviews for the American Botanical Council’s HerbClip service and Research Reviews in HerbalGram.

Mark Blumenthal is the founder and executive director of the American Botanical Council, editor of its peer-reviewed journal HerbalGram, and the senior editor of several books for health professionals: The Complete German Commission E Monographs – Therapeutic Guide for Herbal Medicines, Herbal Medicine: Expanded Commission E Monographs, and The ABC Clinical Guide to Herbs.