1. Department of Basic Sciences, University of Bío-Bío, Chillán, Chile
2. Centre for Biotechnology and Bioengineering (CeBiB), Santiago, Chile
3. Instituto de Matemática e Estatística – Universidade Federal da Bahia, Salvador, Brazil
4. Instituto de Ingeniería Matemática and CIMFAV, Universidad de Valparaíso, Valparaíso, Chile