<chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> <chr_abbr type="reg" class="dc" expan="" cert="no">p-til</chr_abbr> man<chr_abbr type="reg" class="dc" expan="" cert="no">co-hbar</chr_abbr>gier <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> <chr_abbr type="reg" class="dc" expan="" cert="no">p-til</chr_abbr> fol 