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Anthropometric variables. (A) Linear distance variables. CLLH, cutaneous lower lip height; CULH, cutaneous upper lip height; LLH, lower lip height; LVH, lower vermilion height; LW, lip width; PW, philtrum width; TLH, total lip height; ULH, upper lip height; UVH, upper vermilion height; VH, vermilion height; (B) Angular variables; (C) upper and lower lip surface area
