    Sentence t: Adolescent specialist Dr Michael Cohen , who  worked on the study . said doctors had treated eight-  year-old children with anorexia - and that he had once  treated a four-year-old boy    Sentence 2: Adolescent specialist Or. Michael Cohen  who worked on the study. said doctors had treated 8-  year-old children with anorexia - and that he had once  treated a4-year-old boy