ABCG2 and non-small cell lung carcinoma: Some studies have focused on investigating the relationshipsbetween ABCG2 gene polymorphism and treatment effects ofchemotherapy on NSCLC patients, however no consensus has been reached (Cusatis et al., 2006; Han J Y et al., 2007; Akasaka et al., 2010; Müller et al., 2010; Lemos C et al., 2011; Campa et al., 2012; Mariko et al., 2012; Fukudo et al., 2013; Kobayashi et al., 2015; Chen et al., 2015).