Reduced striatal DAT binding is observed consistently in imaging studies of human MA addicts and MA-experienced non-human primates, even during protracted withdrawal (e.g., McCann et al., 1998; Sekine et al., 2001, 2003; Volkow et al., 2001a,b; Johanson et al., 2006; Groman et al., 2012). Here, SLC6A3 is linked to microtia.