Fig. 3From: The value of cytokine levels in triage and risk prediction for women with persistent high-risk human papilloma virus infection of the cervixDifferent types of HPVs identified by pyrosequencing. a–d. Pyrosequencing could distinguish 20 HPV types, which were divided into four groups on average. HPV16 (a) was in group 1, HPV18 (b) was in group 2, HPV58 (c) was in group 3, and HPV6 (d) was in group 4Back to article page