Roels H, Sarhan M J, Hanotiau I, de Fays M, Genet P, Bernard A, Buchet J P, Lauwerys R
Sci Total Environ. 1985 Mar 15;42(1-2):201-6. doi: 10.1016/0048-9697(85)90022-1.
The results of the present epidemiological study among 141 workers (mean age: 34 years) from a Mn salts and oxides producing plant in Belgium suggest that preclinical perturbations (lung function, CNS, biological parameters) may occur in subjects exposed to airborne Mn levels (7 years on the average) usually lower (total dust, geometric mean about 1 mg/m3, 95th percentile 3.3 mg/m3) than the levels actually (5 mg/m3) tolerated.