Four hospitals in Puerto Rico will begin implanting a Florida made microchip the size of a rice grain in patients who suffer from illnesses that cause memory loss, like Alzheimer's disease, a newspaper reported Sunday. The hospitals will start using the microchip, made by the Delray Beach, Fla.-based Verichip Corp., in August, according to El Nuevo Dia. It is inserted in the forearm, costs $200 and is voluntary. "It is a way to offer an additional service because the chip it going to be used on a population that has memory problems ... or great health problems," said Nelson Martinez,...