Which electronic resource covers fda-approved and investigational prescription and nonprescription drugs, as well as non-u. s. preparations?

a. drug topics
b. drugdex by micromedex
c. medical drug reference
d. lexi-calc

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Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.

Which of the following statements is true?