Fig. 3

a Frontal view demonstrating principal soft tissue landmarks used for linear measurements: tr trichion, g glabella, n nasion, sn subnasale, ls labrale superius, sto stomion, li labrale inferius, lmf labiomental fold, me menton, ft, frontotemporale, zy zygion, go gonion, ex exocanthion, en endocanthion, al alare, ac alar curvature point, ch cheilion. b Profile view demonstrating angular measurements