GPRC6A and posterior cortical atrophy: The three studies by Li et al. (2015), Long et al. (2012), and Wang et al. (2012) about the relationship between GPRC6A/RFX6 rs339331 and the incidence of PCa also reached different conclusions [27, 41, 42], which reported reduced risks (OR = 0.78, P = NA), increased risks (OR = 1.34, P = NA) and unrelated association (OR = 0.99, P = 0.84) respectively.