Colonoscopies, real or virtual.
Linton
Otha
O
D023881:Colonography, Computed Tomographic / Q000523:psychology* / Q000639:trends*; D003113:Colonoscopy / Q000523:psychology* / Q000639:trends*; D008403:Mass Screening / Q000523:psychology* / Q000639:trends*; D010818:Practice Patterns, Physicians' / Q000639:trends*; D014481:United States