Talk about your mixed messages. Go to grab a bite in some hospitals and you will see cafeterias offering salad bars and other healthful fare right next to McDonald's outlets offering burgers and fries. Nearly two dozen hospitals that host McDonald's restaurants just got a letter from an advocacy group asking them to evict their fast-food tenants and to "stop fostering a food environment that promotes harm, not health." The group, Corporate Accountability International, is leading a larger campaign to get McDonald's to stop marketing to kids. That effort has been endorsed by nearly 2,000 health professionals, some of which work at the very hospitals still housing the fast food giant, says campaign director Sara Deon....