Place phobia is mainly manifested in the fear of certain specific environments, such as high places, squares, objective environments, and crowded public places. It often starts with a spontaneous panic attack, and then produces expected anxiety and avoidance behaviors, and then conditionalized Some clinical studies have shown that panic attacks are often associated with panic attacks. However, some experts believe that the first panic attack is a necessary condition for the onset of panic phobias. Therefore, they believe that panic phobias are the consequence of the development of panic attacks. Panic disorder. Which of the following, if true, would most question the above-mentioned expert opinion? ['The course of place phobia often fluctuates, and many patients may improve or even ease in the short term.', 'Place phobia may be genetically related and linked to panic disorder.', 'Research finds that onset phobia is more than 40 years old, and its course tends to be chronic.', 'Study finds that approximately 23% of patients have a place fear before a panic attack.']