1. Faculty of Science, Department of Biological Sciences, Bindura University Science Education, Bindura, Zimbabwe
2. Research and Development Department, Institute Ceres/Zavod Ceres, Lahovna, Celje, Slovenia
3. Research and Development Department, Maribor Institute for Biomedical Sciences, Maribor, Slovenia
4. Department of Plastic and Reconstructive Surgery, University Medical Centre Maribor, Maribor, Slovenia