[1] Punta Europa Hosp, Dept Obstet, Algeciras 11207, Spain
[2] Univ Cadiz, Fac Nursing, Nursing & Physiotherapy Dept, Algeciras 11207, Spain
[3] Univ Granada, Fac Hlth Sci Ceuta, Nursing Dept, Ceuta 51001, Spain
[4] Univ Huelva, Fac Labour Sci, Dept Sociol Social Work & Publ Hlth, Huelva 21007, Spain
[5] Univ Espiritu Santo, Safety & Hlth Postgrad Programme, Guayaquil 092301, Ecuador
[6] La Linea de la Concepcion Hosp, Dept Obstet, La Linea De La Concepcio 11300, Spain