Do not keep the samples overnight in the clinics as these samples may give erroneous and misleading analytical results to some tests reported. Examples are falsely elevated potassium level, falsely low glucose result, etc.
Please note that blood/urine specimens CANNOT be kept after 12 hours for tests such as Acid Phosphatase, Calcium, CMV DNA, Electrolytes, Glucose, HCV RNAQ, Phosphate, Urine Culture and Urine FEME.