The Value of Four-Quadrant Cervical Biopsy in Women with Different Colposcopic Impressions oleh Mandy Man-Yee Chu, Charleen Sze-Yan Cheung, Siew-Fei Ngu, Ka-Yu Tse, Philip Pun-Ching Ip, Annie Nga-Yin Cheung, Hextan Yuen-Sheung Ngan, Karen Kar-Loen Chan