New papers continue to arrive from the Lin and Wang group that analyzes data from an ongoing study of Chinese chrysotile mine workers in a mine that had little if any tremolite contamination. Due to its remote location, the authors suggest that the mine workers likely had few "other exposures," except for smoking.
The latest paper includes analysis tied to estimated levels of exposure, as well as smoking status. The paper evaluates lung cancers, non-malignant respiratory disease and GI cancers. A freely accessible, prior paper from 2013 covers much of the same ground. Thus, studies are improving in terms of seeking to control for more variables. One assumes the authors of this new paper are well aware of the 2008 criticisms by ChemRisk of various papers on chrysotile exposures.