Villagran Orellana, M., Martínez Sanguinetti, M. A., Díaz, F., Petermann-Rocha, F. y Celis-Morales, C. (2020) « and physical activity as enhancers of the immune system in times of COVID-19»., ARS MEDICA Revista de Ciencias Médicas, 45(4), pp. 48–60. doi: 10.11565/arsmed.v45i4.1732.