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So there are arguments for slowing the growth of Social Security benefits . As part of the discussion , Kwiterovich will explain the results of a multicenter study to determine the safety of strict low-fat diets in children with high cholesterol levels . As an economist who has worked with economic models for much of my professional career , I have little confidence in the results of models that take hours to run much less hundreds of hours . " A serum test using an antibody such as this might help men avoid the unnecessary and costly prostate biopsies that are caused by false positive results of PSA tests , " says Partin . Kelly Harkless , 18 , is a student at St. Paul 's School for Girls and Michael Harkless , 20 , attends the College of Wooster in Ohio and is spending his junior year studying in Scotland . Results of a 1994 Hopkins study suggested that mutations of the K-ras gene , which commonly occur in pancreatic cancer , can be detected in stool specimens and may be a candidate for an early diagnostic test . " Mutation of the p53 gene , a tumor suppressor gene that normally helps to prevent the formation and growth of cancers , is the most common cancer-related genetic mutation . Still , she found herself wrestling with debilitating bouts of depression that led to thoughts of suicide . " This is important in light of the rapid growth of older people in the population and the complexity of evaluating older patients , " says Gabor Kelen , M.D ., the study 's senior author and director of emergency medicine at The Johns Hopkins Medical Institutions .