An evidence-based systematic review including written and statistical analysis of scientific literature, expert opinion, folkloric precedent, history, pharmacology, kinetics/dynamics, interactions, adverse effects, toxicology and dosing. doi:10.1300/J157v07n03_06 [Article copies available for a fee from The Haworth Document Delivery Service: 1–800-HAWORTH. E-mail address: <docdelivery@haworthpress.com> Website: <http://www.HaworthPress.com>]
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Ulbricht et al. (2008) studied this question.
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