Author: ECHEVERRIA CAZAR, DANIEL FRANCISCO GUERRERO GUASHPA, DEBORA ELIZABETH RUIZ ICAZA, POLETH CAROLINA  SANCHEZ ASITIMBAY, KARLA MISHELL  PARRA BONILLA, LILIANA CAROLINA TULCANAZA PEREZ, KAREN NATALY VACA PILLANA, CHRISTIAN DAVID ZUMBANA NAULA, FABRICIO AGUSTIN