Before revision:  The best nonlinear regression to averaged data and 60\% of individual data is Hull's model, while for the remaining 40\% of the subjects the dynamical model (i) provides a better fit .
After revision:  The best nonlinear regression to averaged data and 60\% of individual data is Hull's model, while for the remaining 40\% of the subjects , while its dynamical extension (i) provides a better fit .