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. Author manuscript; available in PMC: 2020 Jan 22.
Published in final edited form as: Circulation. 2019 Jan 22;139(4):458–472. doi: 10.1161/CIRCULATIONAHA.117.033325

Figure 1:

Figure 1:

Study flow PCI, percutaneous coronary intervention; CMS, Centers for Medicare and Medicaid Services; NPI, National Provider Identification. Low-volume operators performed < 50 PCIs/year; intermediate-volume operators performed 50–100 PCIs/year; high-volume operators performed > 100 PCIs/year