1. Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Pamplona, España
2. Centro de Estudios Ambientales de Cienfuegos, Cienfuegos, Cuba
3. Research and Development Department, Center for Genetic Engineering and Biotechnology (CIGB), Sancti Spíritus, Cuba
4. International Atomic Energy Agency, Environment Laboratories, Monaco, Principality of Monaco
5. Geotop/Université du Québec à Montréal (UQAM), Montréal, Canada