1. Department of Statistics and Demography, Faculty of Social Sciences, University of Eswatini, Kwaluseni, Eswatini
2. Department of Midwifery Science, Faculty of Health Sciences, University of Eswatini, Mbabane, Eswatini
3. College of Public Health, Taipei Medical University, Taipei, Taiwan
4. School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan