Efficacy of an extract of North American ginseng containing poly-furanosyl-pyranosyl-saccharides for preventing upper respiratory tract infections: a randomized controlled trial

CMAJ - Tập 173 Số 9 - Trang 1043-1048 - 2005
Gerald Predy1, Vinti Goel, Ray Lovlin, Allan Donner, Larry Stitt, Tapan K. Basu
1Capital Health, Edmonton, Alta.

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