The study was financially supported by the Lisbon School of Health Technology. The research project: “Occupational exposure to particles and fungi in the waste management
setting.” Coordinators: Carla Viegas and Susana Viegas.
Received: December 30, 2013. Accepted: June 5, 2014.
Corresponding author: S. Viegas, Environmental Health RG – Lisbon School of Health Technology – Polytechnic Institute of Lisbon, av. D. João II, lote 4.69.01, Parque
das Nações, 1990-096 Lisboa, Portugal