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Randomised trial to investigate possible differences in biological availability and effectiveness between vitamin K solution in oil and vitamin K tablets.

1. Determining whether or not the vitamin K tablets have the same biological availability in humans as the vitamin K solution has.2. Determining whether or not the vitamin K tablets are as effective as the vitamin K solution is.

Effects of low-dose aspirin taken at bedtime vs. on awakening on circadian rhythm of platelet function in healthy subjects

To study the effect of 80 mg aspirin intake at bedtime compared with 80 mg aspirin intake on awakening on circadian rhythm of platelet function in healthy subjects.