1. La Inmaculada Hospital, Andalusian Health Service, Huércal Overa, Almería, Spain.
2. Department of Nursing, Physiotherapy and Medicine, University of Almería, Almería, Spain.
3. Faculty of Health Sciences, Universidad Autónoma de Chile, Temuco, Chile.
4. Adult, Child and Midwifery Department, School of Health and Education, Middlesex University, London, United Kingdom.