List WP taxonomies for post w/links and comma seperators
<?php
if( false != get_the_term_list( $post->ID, 'expertise' ) ) { ?>
<div class="person__expertise">
<h3 class="person-details__title"><?php _e('Areas of expertise','leo') ?></h3>
<?php echo get_the_term_list( $post->ID, 'expertise', '', ', ' ); ?>
</div>
<!-- person__expertise -->
<?php } ?>