Percentage changes in mean telomere length and mtDNA copies per nucleus over the time of culture (days) or cell divisions occurred during the experiment (CPD).

%: percentage change, CPD: cumulative population doublings, mtDNA: mitochondrial DNA, IL1B: interleukin 1B, BSO: buthionine sulphoximine.Percentage changes (%) in telomere length or mtDNA with days or CPD are obtained from separate regression models for each treatment adjusted for donor.CPD per days are also obtained from separate regression models for each treatment adjusted for donor.P values for the percentage changes (%) over days or CPD are obtained from regression models including all treatments as dummy variables compared to the control, adjusting for donor.