Fabella in men of three human races.
D000354:Africa, Western / Q000208:ethnology; D044466:Asian People; D044383:Black People; D005006:Ethnicity; D006801:Humans; D007564:Japan / Q000208:ethnology; D007719:Knee Joint / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D011044:Poland; D044469:Racial Groups; D011859:Radiography; D014744:Vietnam / Q000208:ethnology; D044465:White People