Combined effect of silica dust exposure and tobacco smoking on the prevalence of respiratory impairments among gold miners. Authors: Hnizdo E, Baskind E, Sluis-Cremer GK. Source: Scand J Work Environ Health. 1990; 16:411-422. Babalwa Jekwa2019-04-02T14:10:40+02:00Dec 31st, 1990| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail