1. Department of Nursing and Health Sciences, Faculty of Health and Social Sciences, Centre for Women's, Family and Child Health; University of South-Eastern Norway; Kongsberg Norway
2. Department of Midwifery and Women's Health, Division of Health Sciences & Nursing Graduate School of Medicine; The University of Tokyo; Tokyo Japan
3. Department of Paediatric Infectious Diseases, Institute of Tropical Medicine; Nagasaki University; Sakamoto Nagasaki Japan