“…For instance, Marantidou et al (2007) note that young people are less likely to donate in Greece, while Kasraian (2010), Volken et al (2013), and Ou et al (2015) report higher response rates among older donors in Iran, Germany, and Hong Kong, respectively. Meanwhile, Boulware et al (2002), Wiwanitkit (2002), and Shenga et al (2010) find no discerning association between age and knowledge or actual blood donation in U.S., Thailand, and India, respectively.…”