This Jan. 30, 2013 photo provided by the University of Michigan Health System in Ann Arbor, Mich., shows Dr. Beth Tarini, a pediatrician and researcher at UMHS, posing with a selection

 

              This Jan. 30, 2013 photo provided by the University of Michigan Health System in Ann Arbor, Mich., shows Dr. Beth Tarini, a pediatrician and researcher at UMHS, posing with a selection
This Jan. 30, 2013 photo provided by the University of Michigan Health System in Ann Arbor, Mich., shows Dr. Beth Tarini, a pediatrician and researcher at UMHS, posing with a selection of "Little House" books written by Laura Ingalls Wilder. Tarini is the author of a study that suggests that Mary Ingalls, sister of Laura Ingalls Wilder, went blind from a meningitis-like disease and not scarlet fever. (AP Photo/Courtesy of The University of Michigan Health System, Hillary Edwards)