RUNX2 and cleidocranial dysplasia 1: RUNX2 11A allele is associated with fracture at bones with cleidocranial dysplasia-related bones of higher intramembranous ossification (pelvis, scapula, clavicle, ribs, sternum, face/mandible) compared with common fractures in bones of higher content of endochondral ossification (hip and spine combined).