1 Department of Mental Health, University of Port Harcourt, Port Harcourt 500004, Rivers State, Nigeria. Electronic address: frances.adiukwu@uniport.edu.ng.
2 Department of Psychiatry, University of Calabar, Calabar, Cross River State, Nigeria.
3 Department of Neuropsychiatry, University of Port Harcourt Teaching Hospital, Port Harcourt, Rivers State, Nigeria.
4 Department of Medicine, McMaster University, Hamilton, ON, Canada.