The number of hand-wrist centers.
D006225:Hand / Q000033:anatomy & histology*; D006652:Histological Techniques; D006801:Humans; D009999:Ossification, Heterotopic; D010012:Osteogenesis; D034941:Upper Extremity; D014953:Wrist / Q000033:anatomy & histology*
HAND/anatomy and histology; OSSIFICATION; WRIST/anatomy and histology