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Thanks funny site sales 2007 viagra pulmonary hypertension Dr Walter Stewart, of Sutter Health, a not-for-profit health system in northern California, said: “A higher percentage of people have migraine in low-income groups because more people get migraine, not because people in lower income groups have migraine for a longer period of time. Because the remission rate does not differ by income, it means that the duration of time that people have migraine is not different by income level.