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History full circle: 'Novel' sympathomimetics in supplements.
Rasmussen N, Keizers PH. Rasmussen N, et al. Among authors: keizers ph. Drug Test Anal. 2016 Mar-Apr;8(3-4):283-6. doi: 10.1002/dta.1852. Epub 2015 Nov 2. Drug Test Anal. 2016. PMID: 27072841
Dose-to-dose variations with single packages of counterfeit medicines and adulterated dietary supplements as a potential source of false negatives and inaccurate health risk assessments.
Venhuis BJ, Zwaagstra ME, Keizers PH, de Kaste D. Venhuis BJ, et al. Among authors: keizers ph. J Pharm Biomed Anal. 2014 Feb;89:158-65. doi: 10.1016/j.jpba.2013.10.038. Epub 2013 Nov 7. J Pharm Biomed Anal. 2014. PMID: 24291553
A cocktail of synthetic stimulants found in a dietary supplement associated with serious adverse events.
Venhuis B, Keizers P, van Riel A, de Kaste D. Venhuis B, et al. Among authors: keizers p. Drug Test Anal. 2014 Jun;6(6):578-81. doi: 10.1002/dta.1664. Epub 2014 May 6. Drug Test Anal. 2014. PMID: 24802503
Chemical fingerprinting of silicone-based breast implants.
Keizers PH, Vredenbregt MJ, Bakker F, de Kaste D, Venhuis BJ. Keizers PH, et al. J Pharm Biomed Anal. 2015 Jan;102:340-5. doi: 10.1016/j.jpba.2014.09.008. Epub 2014 Sep 16. J Pharm Biomed Anal. 2015. PMID: 25459933
Operation resistance: A snapshot of falsified antibiotics and biopharmaceutical injectables in Europe.
Venhuis BJ, Keizers PH, Klausmann R, Hegger I. Venhuis BJ, et al. Among authors: keizers ph. Drug Test Anal. 2016 Mar-Apr;8(3-4):398-401. doi: 10.1002/dta.1888. Epub 2015 Oct 12. Drug Test Anal. 2016. PMID: 26456392
Pharmacologically effective red yeast rice preparations marketed as dietary supplements illustrated by a case report.
Venhuis BJ, van Hunsel F, van de Koppel S, Keizers PH, Jeurissen SM, De Kaste D. Venhuis BJ, et al. Among authors: keizers ph. Drug Test Anal. 2016 Mar-Apr;8(3-4):315-8. doi: 10.1002/dta.1929. Epub 2016 Jan 26. Drug Test Anal. 2016. PMID: 26810781
A 'natural' weight loss product containing sibutramine.
van Hunsel F, Venhuis BJ, Keizers PH, Kant A. van Hunsel F, et al. Among authors: keizers ph. Drug Test Anal. 2016 Mar-Apr;8(3-4):311-4. doi: 10.1002/dta.1925. Epub 2015 Dec 21. Drug Test Anal. 2016. PMID: 27072843 No abstract available.
Four experimental stimulants found in sports and weight loss supplements: 2-amino-6-methylheptane (octodrine), 1,4-dimethylamylamine (1,4-DMAA), 1,3-dimethylamylamine (1,3-DMAA) and 1,3-dimethylbutylamine (1,3-DMBA).
Cohen PA, Travis JC, Keizers PHJ, Deuster P, Venhuis BJ. Cohen PA, et al. Among authors: keizers phj. Clin Toxicol (Phila). 2018 Jun;56(6):421-426. doi: 10.1080/15563650.2017.1398328. Epub 2017 Nov 8. Clin Toxicol (Phila). 2018. PMID: 29115866
A high crosslinking grade of hyaluronic acid found in a dermal filler causing adverse effects.
Keizers PHJ, Vanhee C, van den Elzen EMW, de Jong WH, Venhuis BJ, Hodemaekers HM, Schwillens P, Lensen DGW. Keizers PHJ, et al. J Pharm Biomed Anal. 2018 Sep 10;159:173-178. doi: 10.1016/j.jpba.2018.06.066. Epub 2018 Jul 2. J Pharm Biomed Anal. 2018. PMID: 29990883
Rapid and robust on-scene detection of cocaine in street samples using a handheld near-infrared spectrometer and machine learning algorithms.
Kranenburg RF, Verduin J, Weesepoel Y, Alewijn M, Heerschop M, Koomen G, Keizers P, Bakker F, Wallace F, van Esch A, Hulsbergen A, van Asten AC. Kranenburg RF, et al. Among authors: keizers p. Drug Test Anal. 2020 Jul 7. doi: 10.1002/dta.2895. Online ahead of print. Drug Test Anal. 2020. PMID: 32638519
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