title: Concern about selection of the subjects.
authors.affiliation: Chengdu, Sichuan, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Chengdu, Sichuan, China.
authors.forename: Xianglong
authors.initials: X
authors.lastname: Han
mesh_terms: D016302:Centric Relation; D003768:Dental Occlusion, Centric; D005260:Female; D006801:Humans; D008297:Male; D008335:Mandibular Condyle / Q000033:anatomy & histology*