The
2 cm closest to the scalp were used for MnH
analyses. The Québec Toxicology Centre of
the Québec National Institute for Public
Health (CTQ-INSPQ) performed the analyses.
Hair samples were not washed before treatment
and analysis. Samples were cut, weighed
(~ 20 mg), and placed in Teflon digestion vessels
(#026R; Savillex, Minnetonka, MN,
USA).