1. Research and Training Unit, Federal Neuropsychiatric Hospital, Calabar, Nigeria
2. Community and Clinical Research Division, First On-Call Initiative, Port Harcourt, Nigeria
3. Community and Clinical Research Division, First On-Call Initiative, Kharkiv, Ukraine
4. University of Calabar, Calabar, Nigeria
5. College of Health Science, Bayero University Kano, Kano, Nigeria.