Hyun Kim, S., Kyoung Seo, B., Lee, J., Jin Kim, S., Ran Cho, K., Yeol Lee, K., … Lee, J.-H. (2008). Correlation of ultrasound findings with histology, tumor grade, and biological markers in breast cancer. Acta Oncologica, 47(8), 1531–1538. https://doi.org/10.1080/02841860801971413