FOR SALE

As the economy worsens in Michigan, more of the state's residents are opting to supplement their income by participating in medical studies and selling their hair, eggs or plasma. The number of plasma donations in the country has increased from 10 million in 2005 to more than 17.5 million in 2008, an official from the Plasma Protein Therapeutics Association said. Sixty plasma clinics opened in the U.S. last year, the official said.