1. Department of Internal Medicine, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Hwasun, Korea
2. Department of Psychiatry, Chonnam National University Medical School, Gwangju, Korea
3. King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
4. South London and Maudsley NHS Foundation Trust, London, UK