Longitudinal blood flow changes at proximal, central and distal part of the femur.

<p>Longitudinal relative blood flow (<i>rBF</i>) changes of the graft leg at (a) proximal (P2), (b) central (P4) and (c) distal (P6) locations are shown for the autograft (black circle) and allograft (red star) groups. Longitudinal changes in Δ<i>rBF</i> (graft-specific blood flow) at (d) proximal, (e) central and (f) distal locations are shown for the autograft (black circle) and allograft (red star) groups. Each data point is the group average and the associated error bar is the standard error of the mean. The pentagram denotes that the <i>rBF</i> or Δ<i>rBF</i> of two groups in the same week is significantly different (<i>p</i> < 0.05).