preferred_name: Dense collagenous sheath of transitional myocyte of atrioventricular bundle
preferred_name_lc: dense collagenous sheath of transitional myocyte of atrioventricular bundle
label: Dense collagenous sheath of transitional myocyte of atrioventricular bundle
label_lc: dense collagenous sheath of transitional myocyte of atrioventricular bundle