[1] Trident Univ, Cypress, CA 90630 USA
[2] Univ Tecnol Fed Parana, Apucarana, Parana, Brazil
[3] Univ Fed Mato Grosso, Cuiaba, MT, Brazil
[4] Bolivian Catholic Univ, Cochabamba, Bolivia
[5] Univ Costa Rica, San Jose, Costa Rica
[6] Univ Lima, Lima, Peru
[7] Univ Pacifico Lima, Lima, Peru