Sequential changes in platelet counts during treatment with peginterferon-α and ribavirin in patients with pretreatment platelet counts between 100,000/μL and 150,000/μL (1A), and < 100,000/μL (1B). Each vertical line represents the range of platelet counts. Each shaded area represents the 25th - 75th percentiles, and each short horizontal line represents the median. F4, F12, and F24 mean follow-up weeks 4, weeks 12, and weeks 24, respectively. *: Number of the patients was 3. #: Number of the patients was 1.