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JAMA. 1987;258(18):2587-2588. doi:10.1001/jama.1987.03400180121042.
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Hansen HJ, Caudill SP, Boone DJ:  Crisis in drug testing: Results of CDC blind study . JAMA 1985;253:2382-2387.
Link to Article[[XSLOpenURL/10.1001/jama.1985.03350400066023]]
Field Manual for Control of Alcohol and Drug Use in Railroad Operations . Federal Railroad Administration, US Dept of Transportation, 1985.
Siegel RK, Elsohly MA, Plowman T, et al:  Cocaine in herbal tea . JAMA 1986;255:40.
Link to Article[[XSLOpenURL/10.1001/jama.255.1.40]]
McBay AJ:  Problems in testing for abused drugs . JAMA 1986;255:39-40.
Link to Article[[XSLOpenURL/10.1001/jama.1986.03370010041020]]
Shaw A:  Disorders of the umbilicus , in Welch K, Randolph J, Ravitch M, et al (eds): Pediatric Surgery , ed 4. Chicago, Year Book Medical Publishers Inc, 1986, pp 735-739.
Blumberg NA:  Infant umbilical hernias . Surg Gynecol Obstet 1980;150: 187-192.


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