作者单位：Technische Universit?t München, Institute of Medical Statistics and Epidemiology, Ismaninger Stra?e[1]Medicine and Aesthetics, Private Clinic for Oral and Maxillofacial and Plastic Surgery[2]Ludwig-Maximilians Universit?t München, Goethestr. 70, D-80336 Munich, Germany[3]Ludwig-Maximilians Universit?t München, Goethestr. 70, D-80336 Munich, Germany, Medicine and[4]Technische Universit?t Munich, Department of Oral and Maxillofacial Surgery, Ismaninger Str. 22, D[5]
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