1. Exact and Natural Sciences Department, Center for Research on Health in Latin America, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
2. Exact and Natural Sciences Department, Laboratory of Nanotechnology, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
3. Department of Chemistry, University of the Balearic Islands, Palma de Mallorca, Balearic Islands, Spain
4. Universidad de las Fuerzas Armadas ESPE, Sangolquí, Ecuador