Fig. 1From: Clinical validation of a blood-based classifier for diagnostic evaluation of asymptomatic individuals with pulmonary nodulesThe effect of clotting time on marker levels in serum. Serum was collected from healthy donors (n = 6) after varying the blood clotting period: 0.5, 4, 24 h. Changes in marker levels observed after clotting for 4 h (blue bar) or 24 h (green bar) were plotted relative to the 0.5 h time pointBack to article page