A.B. KARNIK, H.N. SAIYED, H.G. SADHU, N.G. SATHWARA, Y.K. SHARMA, R.S. KAPADIA, P.K. KULKARNI, A.M. SUTHAR, M.M. PATEL, U.M. DESAI. (2003). Serum ACE, Serum Copper as a Biomarker of Silicosis and Silicotuberculosis