Significant correlations were observed between VO2 peak and nutritional status (BMI, lean body mass), inflammation markers (C-reactive protein [CRP], leukocytosis), resting PFT (FVC, FEV1, RV, DLCO, P(A-a)O2), and quantifiable parameters of CPET (VE peak, VE/VO2 peak, VE/VCO2 peak, BR, VD/VT peak, PaO2 peak, P(A-a)O2 peak, and HR (Table 4 and Figure 1). The gene discussed is CRP; the disease is Increased total leukocyte count.