“…Moreover the incompletely recorded or doubtful patient-information was not considered in the analysis. Apart from routine anamnesis the following information was obtained as a part of routine workup: (1) , larynx (ICD D38.0, D37.01), salivary gland including parotid/submandibular gland (ICD C07, C08 (C08.0, C08.1, C08.8, C08.9)), and ear (ICD D38.5, D48.5)]. In case of involvement of more than one site the respective case was categorized as per the site of maximum involvement.…”