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      "statement": "# Rous: fowl sarcoma transmissible by a cell-free agent\n\nShowed that a cell-free filtrate from a chicken sarcoma could transmit a sarcoma in susceptible chickens and cautiously attributed transmission to a filterable agent.\n\n## Scientific scope\n\nThe record is Rous's sole-author 1911 animal experiment. It did not establish the later molecular identity of Rous sarcoma virus, human viral carcinogenesis, oncogenes or src, and those later contributions remain separate.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nPeyton Rous\n\nThe named authors contributed to this scoped work; individual effort shares and later applications are not assigned by the byline.\n\n\n\n## Original sources\n\n- [PMC full text of Rous cell-free sarcoma transmission paper](https://pmc.ncbi.nlm.nih.gov/articles/PMC2124874/)\n- [Journal of Experimental Medicine retrospective on Rous sarcoma virus](https://rupress.org/jem/article/218/4/e20201754/211883/The-road-from-Rous-sarcoma-virus-to-precision)\n",
      "summary": "Showed that a cell-free filtrate from a chicken sarcoma could transmit a sarcoma in susceptible chickens and cautiously attributed transmission to a filterable agent.",
      "title": "Rous: fowl sarcoma transmissible by a cell-free agent"
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    "id": "rous-filterable-agent-fowl-sarcoma-1911",
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    "revision": 1,
    "title": "Rous: fowl sarcoma transmissible by a cell-free agent",
    "context": "Oncology",
    "track": "METHOD",
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    "what_changed": "Transmitted chicken sarcoma using cell-free filtrate, implicating a filterable agent.",
    "scope": "The record is Rous's sole-author 1911 animal experiment. It did not establish the later molecular identity of Rous sarcoma virus, human viral carcinogenesis, oncogenes or src, and those later contributions remain separate.",
    "evidence_summary": "The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is Rous's sole-author 1911 animal experiment. It did not establish the later molecular identity of Rous sarcoma virus, human viral carcinogenesis, oncogenes or src, and those later contributions remain separate.",
    "references": [
      {
        "title": "PMC full text of Rous cell-free sarcoma transmission paper",
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