1. Department of Chemistry, Rhodes University, Makhanda, South Africa
2. Department of Chemistry, Faculty of Sciences, University of Kinshasa, XI, Kinshasa, DR Congo
3. Research Center for Theoretical Chemistry and Physics in Central Africa, Faculty of Science, University of Kinshasa, Kinshasa, DR Congo
4. Research Unit in Bioinformatics (RUBi), Rhodes University, Makhanda, South Africa