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  "documentTitle": "Penumbra, Inc. (PEN)",
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      "text": "While numerous studies provided evidence that the stent retriever method was safe, effective, and superior to the prevailing standard of care, concurrent studies which focused on aspiration thrombectomy were less successful.",
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      "text": "While numerous studies provided evidence that the stent retriever method was safe, effective, and superior to the prevailing standard of care, concurrent studies which focused on aspiration thrombectomy were less successful.",
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      "text": "The THERAPY study was cut short after the MR CLEAN study concluded that treating acute ischemic stroke with tPA alone - the control treatment in both studies - was inferior to tPA plus mechanical thrombectomy and, therefore, unethical. — Footnote 1",
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      "text": "Aspiration Thrombectomy Studies Produce Fewer Resounding Successes",
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