Unusual attendance at Hospital Emergency Services for asthma and chronic obstructive pulmonary disease and SO2 air pollution in Cartagena (Spain)

1. Guillén Pérez, J.J.
2. Guillén Grima, F.
3. Medrano Tortosa, J.
4. García-Marcos Alvarez, L.
5. Aguinaga Ontoso, I.
6. Níguez Carbonell, J.C.