File:WSJ placebo knee.jpg

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WSJ_placebo_knee.jpg(225 × 406 pixels, file size: 27 KB, MIME type: image/jpeg)

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current22:56, 7 January 2014Thumbnail for version as of 22:56, 7 January 2014225 × 406 (27 KB)Bill Peterson (talk | contribs)

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