Comment on

• Variation in carotid endarterectomy mortality in the Medicare population: trial hospitals, volume, and patient characteristics.

  Wennberg DE, Lucas FL, Birkmeyer JD, Bredenberg CE, Fisher ES. Wennberg DE, et al. JAMA. 1998 Apr 22-29;279(16):1278-81. doi: 10.1001/jama.279.16.1278. JAMA. 1998. PMID: 9565008
• Indications, outcomes, and provider volumes for carotid endarterectomy.

  Cebul RD, Snow RJ, Pine R, Hertzer NR, Norris DG. Cebul RD, et al. JAMA. 1998 Apr 22-29;279(16):1282-7. doi: 10.1001/jama.279.16.1282. JAMA. 1998. PMID: 9565009