Setting and participants
Details on this study have been published elsewhere (Steinisch et al., 2013). Briefly, between February and March 2012, a cross-sectional interview-based study was conducted among workers of an export-oriented RMG factory in Dhaka, Bangladesh. A total of 553 workers were employed in the selected factory and valid interview data were obtained from 514 (93%) individuals. Of these, a total of 131 female and 44 male workers provided hair samples (34%). This study received ethical approval by the Bangladesh Medical Research Council and was conducted in accordance with the Declaration of Helsinki. All procedures were carried out with written informed consent of the participants.