by means of LC-HRMS/MS and Western blotting. Drug Test Anal. 2020 Nov;12(11-12):1636-1648. doi: 10.1002/dta.2925. Epub 2020 Oct 12. PMID: 32959984. Zwingmann L, Below T, Braun H, Wahl P, Goldmann JP. [...] ostarine mimicking contaminated products ingestion. Drug Test Anal. 2020 Nov;12(11-12):1570-1580. doi: 10.1002/dta.2933. Epub 2020 Oct 12. PMID: 32959982. Walpurgis K, Scheiff AB, Welz M,et al. Pilot study on [...] its influence on the (13) C/(12) C ratios of excreted steroids. Drug Test Anal. 2010 Nov;2(11-12):620-9 Piper T, Opfermann G, Thevis M, Schänzer W. Determination of (13)C/(12)C ratios of endogenous urinary