1. Department of Family Nursing, Division of Health Sciences & Nursing, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
2. Global Nursing Research Center, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
3. Department of Health Policy, National Center for Child Health and Development, Tokyo 157-0074, Japan
4. Research Centre for Social Science and Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan
5. Section of Public Health Nursing Research Department of Health Promotion, National Institute of Public Health, Saitama 351-0197, Japan
6. Department of Community Nursing, Toho University, Tokyo 143-8540, Japan
7. Graduate Programs in Family Nursing, International University of Health and Welfare, Tokyo 107-8402, Japan
8. Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
9. Department of Applied Social Sciences, The Hong Kong Polytechnic University, Hong Kong, China