Demographics of subjects in the discovery and verification stages.

Quantitative data of normal distribution are presented as mean±SD. Quantitative data of non-normal distribution are presented as median (interquartile range). Qualitative data are presented as n(%).WBC counts, white blood cell counts; CRP, C-reactive protein; PCT, Procalcitionin; APACHE II score, Acute Physiologic Assessment and Chronic Health Evaluation II scores; SOFA score, Sequential Organ Failure Assessment scores.