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Flowchart of patients. CK = cytokeratin; EBUS-TBNA = endobronchial ultrasound-guided transbronchial needle aspiration; EGFR = epidermal growth factor receptor; EUS = endoscopic ultrasound; IHC = immunohistochemistry; NOS = not otherwise specified; NSCLC = non–small cell lung cancer; TTF-1, thyroid transcription factor 1.
