1. Center for Natural Sciences, School of Arts and Sciences, Saint Mary's University, Bayombong, Nueva Vizcaya 3700, Philippines.
2. The Graduate School, College of Science, University of Santo Tomas, Manila 1015, Philippines.
3. Research Center for the Natural and Applied Sciences, Thomas Aquinas Research Complex, University of Santo Tomas, Manila 1015, Philippines.
4. Department of Biological Sciences, College of Science, University of Santo Tomas, Manila 1015, Philippines.