6 mL Whole blood in 2 Blue Top (Sodium Citrate) tubes. Mix thoroughly by inversion. Transport to Lab within 4 hours. If this is not possible, make PPP within 1 hour of collection as follows: Centrifuge sample at 3600 rpm for 15 min. & transfer supernatant to a clean plastic tube. Centrifuge this supernatant again at 3600 rpm for15 min. & finally transfer the supernatant (PPP) to 1 labelled clean plastic screw capped vial. FREEZE IMMEDIATELY. Ship frozen. DO NOT THAW AND 5 mL (3 mL min.) Whole blood in 2 Lavender Top (EDTA) tubes. Ship refrigerated. DO NOT FREEZE. Overnight fasting is preferred. Duly filled . It is recommended that patient discontinues Heparin for 1 day and Oral Anticoagulants for 7 days prior to sampling as these drugs may affect test results. Discontinuation should be with prior consent from the treating Physician.