Figure 2.

Between-visit correlation graphs of viral load measurements of four combined HPV types (HPV-16, 18, 31, 45) at enrolment and follow-up visits (see material and methods). For example, the upper left graph shows viral load at entry versus viral load at 6 months, the lower left graph shows viral load at entry versus viral load at 24 months.

Ramanakumar et al. BMC Infectious Diseases 2010 10:326   doi:10.1186/1471-2334-10-326
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