| http://www.w3.org/ns/prov#value | - Self-referral to health care products and services has risen steadily since 1988, when direct-to-consumer (DTC) marketing of pharmaceuticals was authorized by the US Federal Trade Commission (FTC).1 Since the late 1990s, self-referral for whole-body computed tomography (CT) and magnetic resonance imaging (MRI) for early screening for cancer, cardiovascular disease, and other diseases has followed
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