Generate a full detail guide for leaders on managing imposter syndrome. The guide's tone should be empathetic and validating. It must include detailed sections on: 1. Why high-achievers are particularly prone to imposter syndrome. 2. How to recognize the specific thought patterns associated with it. 3. A practical exercise for documenting and internalizing your achievements. 4. The power of creating a peer support group with other leaders. 5. When and how to seek professional support from a coach or therapist. Please include a supportive disclaimer.