By Michelle Castillo /CBS News Emphasis on warning parents about the dangers of over-the-counter cough and cold medicines may have led to fewer emergency room visits for kids. A new Centers for Disease Control and Prevention (CDC) study published on Nov. 11 in Pediatrics showed that fewer kids went to the ER after manufactures added warning labels to the medicine bottles. Medication manufacturers voluntarily recalled some cough and cold medications in October 2007 after increases ...