The middling tendency in reading chest films for pneumoconiosis: an important source of bias and variability Author: Hessel PA. Source: Am J Ind Med. 1985; 8:43-48. Summary: NULL Babalwa Jekwa2019-04-08T09:38:34+02:00Dec 31st, 1986| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail