SLC2A9 and gout: Previous studies identified several transporter genes associated with gout, such as ATP-binding cassette transporter, subfamily G, member 2 (ABCG2/BCRP) [11, 16–18], GLUT9/SLC2A9 [19–21], monocarboxylate transporter 9 (MCT9/SLC16A9) [22], and organic anion transporter 4 (OAT4/SLC22A11) [23].