Liu Y, et al. - Researchers performed a reanalysis of an updated database of lung asbestos fiber levels for 21 brake repair workers who died of mesothelioma using robust maximum likelihood-based regression methods to address nondetectable measurements. Applying bivariate normal regression, they addressed the doubly left-censored situation where both the lung fiber concentration of noncommercial (TAA) and commercial amphiboles (AC) were subject to detection limits. Findings support that among some brake workers, exposure to commercial amphibole asbestos, and not chrysotile, is related to the occurrence of mesothelioma.