All studies that are being offered vary in study duration and number of visits. Many of our studies run from approximately 16 weeks to 40 weeks. If you qualify for one of our studies and decide to take part, you will be randomly assigned to receive either the study medication or a placebo. Some visits will occur at the study clinic and others may be remote (either by telephone, video conference, or home visit). Lab tests, a physical exam, and other assessments and questionnaires will be conducted at study visits.