According to the American Psychological Association, "most specialists agree that a combination of cognitive and behavioral therapies are the best treatment for panic disorder. Medication might also be appropriate in some cases." The first part of therapy is largely informational; many people are greatly helped by simply understanding exactly what panic disorder is and how many others suffer from it. Many people who suffer from panic disorder are worried that their panic attacks mean they are "going crazy" or that the panic might induce a heart attack. Cognitive restructuring helps people replace those thoughts with more realistic, positive ways of viewing the attacks. Avoidance behavior is one of the key aspects that prevent people with frequent panic attacks from functioning healthily. Exposure therapy, which includes repeated and prolonged confrontation with feared situations and body sensations, helps weaken anxiety responses to these external and internal stimuli and reinforce realistic ways of viewing panic symptoms.