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Rapid assessment of the illegal presence of 1,3-dimethylamylamine (DMAA) in sports nutrition and dietary supplements using 1H NMR spectroscopy.
Drug Test Anal. 2014 Sep;6(9):944-8. doi: 10.1002/dta.1677. Epub 2014 Jun 9.
Drug Test Anal. 2014.
PMID: 24913715
Electronic cigarettes: overview of chemical composition and exposure estimation.
Hahn J, Monakhova YB, Hengen J, Kohl-Himmelseher M, Schüssler J, Hahn H, Kuballa T, Lachenmeier DW.
Hahn J, et al. Among authors: hengen j.
Tob Induc Dis. 2014 Dec 9;12(1):23. doi: 10.1186/s12971-014-0023-6. eCollection 2014.
Tob Induc Dis. 2014.
PMID: 25620905
Free PMC article.
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Perception of One's Own Voice After Hearing-Aid Fitting for Naive Hearing-Aid Users and Hearing-Aid Refitting for Experienced Hearing-Aid Users.
Hengen J, Hammarström IL, Stenfelt S.
Hengen J, et al.
Trends Hear. 2020 Jan-Dec;24:2331216520932467. doi: 10.1177/2331216520932467.
Trends Hear. 2020.
PMID: 32812519
Free PMC article.
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Perceived Voice Quality and Voice-Related Problems Among Older Adults With Hearing Impairments.
Hengen J, Hammarström IL, Stenfelt S.
Hengen J, et al.
J Speech Lang Hear Res. 2018 Sep 19;61(9):2168-2178. doi: 10.1044/2018_JSLHR-S-17-0383.
J Speech Lang Hear Res. 2018.
PMID: 30167670
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Patient characteristics and intervention effect as measured by Voice Handicap Index.
Hengen J, Peterson M, McAllister A.
Hengen J, et al.
Logoped Phoniatr Vocol. 2017 Jul;42(2):93-98. doi: 10.1080/14015439.2016.1219387. Epub 2016 Aug 18.
Logoped Phoniatr Vocol. 2017.
PMID: 27536880
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