SLC29A2 and depressive symptom measurement: Gene SLC29A2 (MCMCglmm: pair-living, post mean = −1.65, pMCMC = 0.02; longevity, post mean = 2.30 ± 0.05, pMCMC = 0.04 ± 3.18 × 10−3) is linked to the development of depression.