Fig. 1From: Oral intermittent vitamin D substitution: influence of pharmaceutical form and dosage frequency on medication adherence: a randomized clinical trialStudy design: Patients obtained vitamin D either as tablets (5.600 IU) and capsules (20.000 IU) or 1.4 ml oily drops (5.600 IU) and 5 ml alcoholic drinking solution (24.000 IU), for weekly and monthly administration over 3 months, respectively. Blood samples and questionnaires were obtained at inclusion, 3 and 6 monthsBack to article page