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Clinical Recommendations

NCCN Categories of Evidence and Consensus

  • Category 1: The recommendation is based on high level evidence (e.g. randomized controlled trials) and there is uniform NCCN consensus.
  • Category 2A: The recommendation is based on lower level evidence and there is uniform NCCN consensus.
  • Category 2B: The recommendation is based on lower level evidence and there is nonuniform NCCN consensus (but no major disagreement).
  • Category 3: The recommendation is based on any level of evidence but reflects major disagreement.

All recommendations are category 2A unless otherwise noted.

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