Time-series analysis (1) Sulfur (1) Respiratory organs--Diseases (1) Pollutants (1) Ozone (1) Mortality (1) Meta-analysis (1) Influenza (1) Hospitals--Admission and discharge (1) Health (1) Etiquette (1) Diseases (1) Cities and towns (1) Cardiovascular system (1) Carbon monoxide (1) Calendar (1) Building (1) Air--Pollution (1) Hospitales--Admisión y alta (1) Meta-análisis (1) Contaminantes (1) Ozono (1) Monóxido de carbono (1) Calendario (1) Salud (1) Azufre (1) Gripe (1) Estudio (1) Series temporales (1) Morbilidad (1)