17-a-estradiol late in life extends lifespan in aging UM-HET3 male mice; nicotinamide riboside and three other drugs do not affect lifespan in either sex - Harrison, DE; Strong, R; Reifsnyder, P; Kumar, N; Fernandez, E; Flurkey, K; Javors, MA; Lopez-Cruzan, M; Macchiarini, F; Nelson, JF; Markewych, A; Bitto, A; et al. (AGING CELL, 2021)