We found that the expression levels of GUCY1B1 and A1 were both positively correlated with ERG expression in the total PCa cohort (Fig. 1b) and ERG was among the top ranked genes whose expression was associated with increased expression of GUCY1B1 and A1 (Fig. 1c, d). The gene discussed is GUCY1B1; the disease is posterior cortical atrophy.