Marin County, Calif., has one of the highest rates of breast cancer in the world, a fact that scientists know has nothing to do with the land itself but with some other, unknown factor.

Almost half of adults with type 2 diabetes report acute and chronic pain, and close to one quarter report neuropathy, fatigue, depression, sleep disturbance and physical or emotional disability, according to a study of more than 13,000 adults conducted by researchers at the San Francisco VA Medical Center, the University of California, San Francisco and the Kaiser Permanente Division of Research in Oakland, CA. The researchers also found significant rates of shortness of breath, nausea and constipation.