Comparative increases in utilization rates of ultrasound examinations among radiologists, cardiologists, and other physicians from 1993 to 2001.

Levin DC, Rao VM, Maitino AJ, Parker L, Sunshine JH. Comparative increases in utilization rates of ultrasound examinations among radiologists, cardiologists, and other physicians from 1993 to 2001. J Am Coll Radiol. 2004 Aug; 1(8):549-52.

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