| web | http://www.ecowatch.com/study-links-fracking-to-asthma-attacks-1931702783.html |
| author | Lorraine Chow |
| publication | EcoWatch |
| date | 2016-07-19 |
| web | Sara G. Rasmussen, MHS; Elizab... | JAMA Intern Med | 2016-07-18 |
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