1. Chemical Engineering Department, University of Concepcion, PO Box 160-C, Correo 3, Concepción, Chile Email: czaror@udec.cl
2. Chemical Engineering Department, University of Concepcion, PO Box 160-C, Correo 3, Concepción, Chile Email: crsegura@udec.cl
3. Organic Chemistry Department, University of Concepcion, PO Box 160-C, Correo 3, Concepción, Chile Email: hmansill@udec.c
4. Microbiology Department, University of Concepcion, PO Box 160-C, Correo 3, Concepción, Chile Email: mmondaca@udec.cl
5. Public Health Department University of Concepcion, PO Box 160-C, Correo 3, Concepción, Chile Email: patrigon@udec.cl