Participants of the study (publication 8545) were recontacted and interviewed regarding medication use during the 10 years before diagnosis. Regular use of medication was defined as use at least 4 days a week for 6 months or longer. The interview included following medication classes previously shown to be associated with reduced melatonin levels (publication 7471): calcium channel or beta blocker, psychotherapeutics, corticosteroids, and nonsteroidal anti-inflammatorydrugs.
National Cancer Institute (NCI; U.S. National Institutes of Health), Maryland, USA
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