Additional file 5. Correlation analysis between dDDH values and ANI values. The exponential equation [y = 89.78*exp. (0.00107*x)-57.74*exp.(− 0.07575*x)] was obtained using a nonlinear simulation analysis method with the default option of the Curve Fitting Tool implemented in MATLAB R2018a. The two approaches revealed a significant correlation, with an r2 = 0.9947.