Fig. 2

Geographic area of provenance of screenees are summarized according to numeric categories: 1–10 screenees, 11–100 screenees, 101–500 screenees, and > 500 screenees. The geographic distribution of pleural plaques is reported as the ratio between the number of screenees with pleural plaques and specific number of screenees from each geographic area (adapted from https://commons.m.wikimedia.org)