An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Weber A, Smith A, Williams-Warren J, Ramsey B, Covert DS.Weber A, et al. Among authors: covert ds.Pediatr Pulmonol. 1994 May;17(5):331-9. doi: 10.1002/ppul.1950170511.Pediatr Pulmonol. 1994.PMID: 8058428
Koenig JQ, Pierson WE, Covert DS, Marshall SG, Morgan MS, van Belle G.Koenig JQ, et al. Among authors: covert ds.Res Rep Health Eff Inst. 1988 Jan;(14):5-24.Res Rep Health Eff Inst. 1988.PMID: 3269255
Koenig JQ, Covert DS, Smith MS, van Belle G, Pierson WE.Koenig JQ, et al. Among authors: covert ds.Toxicol Ind Health. 1988 Dec;4(4):521-32. doi: 10.1177/074823378800400410.Toxicol Ind Health. 1988.PMID: 3188048Clinical Trial.