Additional outcomes evaluated included markers of oxidative stress, inflammatory cytokines, and chemokines (Cachon et al., 2014), chronic bronchitis from occupational exposures to dust (Hinson et al., 2016), elevated prostate specific antigen (PSA) among young men exposed occupationally to quarry pollutants (Ewenighi et al., 2017), chronic respiratory symptoms among limestone factory workers in Zambia (Bwalya et al., 2011), and allergic rhinitis in urban areas (Flatin et al., 2018). The gene discussed is KLK3; the disease is chronic bronchitis.