EML4-ALK fusion gene assessment using metastatic lymph node samples obtained by endobronchial ultrasound-guided transbronchial needle aspiration..     ///    "Screening of these specimens with immunohistochemistry revealed ALK positivity in seven cases (6.4%), all of which possessed echinoderm microtubule-associated protein-like 4-ALK fusion genes as detected by fluorescent in situ hybridization and reverse transcription-PCR. "