highly significantP = 0.0001
Perhaps due to divergent trajectories with age of TLs in HSCs versus male germ cells, the correlation we observed between sperm TL and LTL, although highly significant ( P = 0.0001), is much weaker ( r = 0.33) than has been observed among somatic tissues, ( Benetos et al. , 2011 ; Granick et al. , 2011 ; Smith et al. , 2011 ).