Now you see it, now you don't...
Wray
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D000844:Ankylosis / Q000000981:diagnostic imaging; D006801:Humans; D008437:Maxilla; D008963:Molar / Q000000981:diagnostic imaging*; D011859:Radiography; D013997:Time Factors; D014076:Tooth Diseases / Q000000981:diagnostic imaging*; D014078:Tooth Eruption