They sent me a mailing looking for candidates with High Blood Pressure. After filling out 30 minutes of paperwork, they took my blood pressure and told me I would not not be a candidate for their Blood Pressure Study because my blood pressure was in perfect range. What a waiste of time. They should have stated that they were looking for candidates that had UNCONTROLLABLE HIGH PRESSURE. What a waiste of time. Let me suggest you ask questions upfront before volunteering for one of their studies.