Label-Free Classification of a Nasopharyngeal Carcinoma Tissue Test at Different Stages Based on Raman Spectroscopy. - MINGYU LIU; JINYONG LIN; SUFANG QIU; WEILIN WU; GAOQIANG LIU; YAN LI; HAIMING GONG; RONG CHEN; GUANNAN CHEN (Journal of AOAC International, 2017)