{
  "apiVersion": "v0.1",
  "methodology": "https://sourcescore.org/methodology/",
  "canonical": "https://sourcescore.org/compare/mayo-clinic-vs-nih-gov/",
  "summary": "Commercial physician-reviewed health info vs US government primary medical authority — different sourcing tiers.",
  "a": {
    "slug": "mayo-clinic",
    "name": "Mayo Clinic",
    "domain": "mayoclinic.org",
    "canonical": "https://sourcescore.org/source/mayo-clinic/",
    "api": "https://sourcescore.org/api/source/mayo-clinic.json",
    "scores": {
      "index": {
        "value": 87,
        "grade": "A",
        "rationale": "A — gold-standard health-information citation; physician-reviewed throughout.",
        "signals": [
          {
            "label": "Composite",
            "detail": "Discipline 88 + Modern Reference 85 + Velocity 88."
          }
        ]
      },
      "discipline": {
        "value": 88,
        "grade": "A",
        "rationale": "Physician-reviewed patient information; review dates visible; HONcode certified.",
        "signals": [
          {
            "label": "Physician review",
            "detail": "Every page reviewed + signed by named MD/DO; review date visible."
          }
        ]
      },
      "modernReference": {
        "value": 85,
        "grade": "A",
        "rationale": "Schema.org MedicalCondition + MedicalProcedure markup; open access; structured.",
        "signals": [
          {
            "label": "Medical schema",
            "detail": "MedicalCondition / MedicalProcedure / Drug schema applied per page."
          }
        ]
      },
      "velocity": {
        "value": 88,
        "grade": "A",
        "rationale": "Default health-information citation in AI-engine queries; heavy media + clinician cross-cite.",
        "signals": [
          {
            "label": "AI-engine default",
            "detail": "Primary citation surfaced by ChatGPT/Claude/Perplexity for symptom + condition queries."
          }
        ]
      }
    }
  },
  "b": {
    "slug": "nih-gov",
    "name": "U.S. National Institutes of Health",
    "domain": "nih.gov",
    "canonical": "https://sourcescore.org/source/nih-gov/",
    "api": "https://sourcescore.org/api/source/nih-gov.json",
    "scores": {
      "index": {
        "value": 95,
        "grade": "A+",
        "rationale": "A+ — federal medical research authority; primary-source data + policy.",
        "signals": [
          {
            "label": "Composite",
            "detail": "All 4 dimensions ≥92."
          }
        ]
      },
      "discipline": {
        "value": 95,
        "grade": "A+",
        "rationale": "Federally-funded research subject to grant + ethics oversight; ClinicalTrials.gov registration required for human studies.",
        "signals": [
          {
            "label": "Grant + ethics oversight",
            "detail": "Human research subject to IRB review + federal regulations."
          }
        ]
      },
      "modernReference": {
        "value": 94,
        "grade": "A",
        "rationale": "Operates PubMed + NCBI + ClinicalTrials.gov; APIs + bulk data + structured XML throughout.",
        "signals": [
          {
            "label": "ClinicalTrials.gov",
            "detail": "Mandatory trial registry, machine-readable."
          }
        ]
      },
      "velocity": {
        "value": 96,
        "grade": "A+",
        "rationale": "Default biomedical citation source for AI engines + journalism; NIH press releases cited globally.",
        "signals": [
          {
            "label": "Pandemic-era cite rate",
            "detail": "Spiked 10x during COVID; sustained elevated baseline."
          }
        ]
      }
    }
  },
  "winners": {
    "index": "nih-gov",
    "discipline": "nih-gov",
    "modernReference": "nih-gov",
    "velocity": "nih-gov"
  },
  "license": {
    "methodology": "Cite as: SourceScore Methodology v0.1, sourcescore.org",
    "data": "Underlying public-source data credited to original publishers"
  }
}