1. Department of Psychiatry , University of the Witwatersrand , Johannesburg , South Africa
2. The ABC Centre for Mental Health Studies , Santo André , SP , Brazil
3. National Institute of Mental Health and Neuroscience , Bangalore , India
4. Anxiety Disorders Clinic And Research Center , Buenos Aires , Argentina
5. University of Bonn, Germany & Royal Derby Hospital , Bonn , United Kingdom
6. Institute of Mental Health, Serbian Academy of Sciences and Arts , Belgrade , Serbia
7. Department of Psychiatry , University of Michigan , Michigan , United States of America
8. Imperial College , London , England