Direct to consumer marketing: switch to over the counter can become indirect advertising directly to consumers.
Duerden
Martin
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Walley
Tom
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D000329:Advertising / Q000639:trends*; D004345:Drug Industry / Q000639:trends*; D011307:Drug Prescriptions; D006801:Humans; D040541:Marketing / Q000379:methods*; D004366:Nonprescription Drugs
D004366:Nonprescription Drugs