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Detection of cervical lymph node metastasis in head and neck cancer patients with clinically N0 neck—a meta-analysis comparing different imaging modalities

Li-Jen Liao, Wu-Chia Lo, Wan-Lun Hsu, Chi-Te Wang and Mei-Shu Lai*

BMC Cancer 2012, 12:236  doi:10.1186/1471-2407-12-236