Unsal, Alaettin, Department of Public Health, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
Uthis, Penpaktr, Faculty of Nursing, Chulalongkorn University, Bangkok, Thailand
Uzun, Arzu, Department of Midwifery, Çanakkale Onsekiz Mart University, Çanakkale, Turkey.