Several studies suggest that adopted children may be more at risk for mental health problems. Experts say the longer a child has been in an institutionalized setting, the more likely the child is to have disorders such as attention-deficit hyperactivity disorder (ADHD), oppositional defiance disorder, separation anxiety disorder, and depression. Researchers say this should not discourage potential adoptive parents, because counseling, ADHD medication, and help from adoption specialists can help...