Mu, W.- na, Li, J.- heng, Liu, Y., Liang, H.- qing and Liu, X. 2022. Comparative study of core needle biopsy and fine needle aspiration in the treatment of metastatic lymph nodes guided by contrast-enhanced ultrasound. Pakistan Journal of Medical Sciences. 38, 6 (Jul. 2022). DOI:https://doi.org/10.12669/pjms.38.6.5471.