Vicissitudes in research: the twenty-four hour urine collection.
D000328:Adult; D003142:Communication; D005260:Female; D006801:Humans; D008297:Male; D008508:Medication Errors; D008660:Metabolism; D010361:Patients; D010564:Personnel, Hospital; D012106:Research; D013048:Specimen Handling; D013997:Time Factors; D014556:Urine