Comparison of volume results of Barbary macaque anogenital swelling volumes obtained by the landmark setting of two people.

The table shows volumes and number of secondary landmarks set (in parentheses), and the change in volume with the difference in number of landmarks set between swelling states (in parentheses). Although absolute volume results do not coincide, the increase in volume from the unswollen to the swollen state was found to be comparable across landmark setters.