1. School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Department of Global Health, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
3. Noble Philanthropic Social Group NGO, BP Limbe, Southwest Region, Cameroon
4. Department of Anthropology, University of Bayreuth, Bayreuth, Germany