A case-crossover study between air pollution and hospital emergency room visits by asthma attack

Author(s):  
Hyoung June Im ◽  
Sang Yun Lee ◽  
Ki Jung Yun ◽  
Young Su Ju ◽  
Dae Hee Kang ◽  
...  
1993 ◽  
Vol 147 (4) ◽  
pp. 826-831 ◽  
Author(s):  
Joel Schwartz ◽  
Daniel Slater ◽  
Timothy V. Larson ◽  
William E. Pierson ◽  
Jane Q. Koenig

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