Asthma trends in Switzerland: the Swiss Sentinel Surveillance Network, 1988-1996.
The setting up of the Swiss Sentinel Surveillance Network (SSSN) in 1986 has provided an excellent opportunity to study the distribution and determinants of asthma. The system provides morbidity data, which are representative of family practices in primar
Bollag
U
U
Cloetta
J
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Oberreich
J
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Paget
J.W.
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