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Selection of cytology specimens with applying the criteria of the 2015 WHO classification with subsequent immunohistochemistry for the present study (TTNA, transthoracic fine needle aspiration; SPL, solitary pulmonary lesion; IHC, immunohistochemistry; CB, cell block; ADC, adenocarcinoma; SQC, squamous cell carcinoma; NSCC-NOS, non-small cell carcinoma-not otherwise specified)
