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Six million U.S. patients with diabetes take insulin, which was discovered in 1921 — yet is available only in brand-name forms. The reasons why an agent discovered almost 100 years ago is still unavailable as a low-priced generic have implications for policy and practice.
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Stored only when both papers are in the corpus — 81 citations exist upstream.
Papers that cite the same references — the relational fallback while embeddings are still backfilling.
Imported from OpenAlex (CC0) — nothing here is generated.