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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|current||22:56, 7 January 2014||225 × 406 (27 KB)||Bill Peterson||http://online.wsj.com/news/articles/SB10001424052702304244904579278442014913458|