“…Some studies included a group of participants who received other types of cataract surgery, in which case we used only the data from the participants who underwent phacoemulsification. The studies were conducted in 17 different countries: three in Brazil (Ticly 2014; Tzelikis 2015; Zanetti 2012), two in Canada (Almeida 2008; Almeida 2012), four in China (Chen 2015; Li 2011; Wang 2013; Zhang 2008), one in Cuba (Ruiz Rodríguez 2011), one in Egypt (Elsawy 2013), one in France (Adam 2005), two in Germany (Hessemer 1996; Schmitt 1995), two in Greece (Chatziralli 2011; Moschos 2012), one in India (Sahu 2015), one in Iran (Entezari 2016), seven in Japan (Asano 2008; Endo 2010; Kato 1998; Miyake 2007; Miyake 2011; Miyanaga 2009; Shimazaki 1996), one in Mexico (Cervantes-Coste 2009), one in South Korea (Jung 2015), two in Sweden (Laurell 2002; Zaczek 2014), one in Thailand (Trinavarat 2003), two in Turkey (Dal 2014; Yavas 2007), and seven in the United States (Duong 2014; el-Harazi 1998; Holzer 2002; Mathys 2010; Singh 2012; Solomon 2001; Wittpenn 2008). Investigators of nine studies did not report in which country the trial had been conducted (Bucci 2001; Demco 1997; Donnenfeld 2006; Guzey 2000; McColgin 1999; Mulet 2001; Ostrov 1997; Roberts 1995; Voudouri 2002).…”