Recovery kinetics of CD4⁺ and CD8⁺ T cells from individual patients after intensive chemotherapy. Cell numbers were measured in the peripheral blood at serial timepoints after completion of chemotherapy and fitted to either an exponential or linear growth equation. The lines represent predicted values calculated by either the regulated exponential growth model - - - - - or the linear growth model ——. (A) Patient no. 1; (B) patient no. 5.