ST. LOUIS, Missouri, June 28 (TNSjou) -- The Washington University School of Medicine issued the following news release: * * * Early intervention changes trajectory for depressed preschoolers Several months of parent-child therapy program yields positive effects for years, study finds * Depression affects 1%-2% of children younger than 13 in the U.S. and can arise as early as age 3, but a specialized therapeutic intervention can help preschool-aged children find relief from this condition -  more