Fig. 1

The 32 anatomic landmarks (upper facial third: trichion, glabella, superciliary ridge; middle facial third: nasion, pronasale, subnasale, exocanthion, pupil, endocanthion, tragion, zygion, alare, and subalare; lower facial third: labiale superius, labiale inferius, sublabiale, pogonion, gnathion, crista philtre, cheilion, and gonion)