hip dysplasia Article 2 adult 2 case report 2 clinical article 2 clinical feature 2 female 2 gene 2 human 2 phenotype 2 scoliosis 2 whole exome sequencing 2 Adult 1 Asian Continental Ancestry Group 1 Asian continental ancestry group 1 Base Sequence 1 COL2A1 1 COL2A1 gene 1 COL2A1 protein, human 1 Cervical Vertebrae 1 China 1 Chinese 1 Chinese population 1 Collagen Type II 1 Decompression, Surgical 1 Family 1 Female 1 Humans 1 Magnetic Resonance Imaging 1 Mutation 1