1. Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain.
2. Leicester School of Allied Health Sciences, De Montfort University, Leicester, LE1 9BH, UK.
3. Public Health Department. University of Makeni, Makeni, Sierra Leone.
4. Facultad de Farmacia, Universidad San Pablo CEU, Urbanización Montepríncipe, Boadilla del Monte, Madrid, Spain.
5. Departamento de Ciencias Biomédicas, Universidad de Alcalá, Crta. Madrid-Barcelona Km, 33.6, 28871 Alcalá de Henares, Madrid, Spain