Just 3,122 of 7K patients tested so far
                                
                                
                                    (Newser) -
                                    An investigation into an Oklahoma dentist accused of major health violations at his clinic for years has turned up at least 60 patients with hepatitis, reports  ABC News . More than 7,000 former patients of Dr. W. Scott Harrington were  sent warning letters in March  that Harrington had regularly re-used...