Fig. 2

Diurnal differences in maximum flow rates (Qmax) during the free urination period in bright daylight conditions (white circle) in a, in dim daylight conditions (filled circle) in b, and the merged graph in c (*p < 0.05, **p < 0.01 by Dunnett’s multiple comparison test, one-way ANOVA; #p < 0.05 by two-way repeated measures ANOVA followed by Sidak’s multiple comparison test). Error bars represent SEM. Br indicates bright daylight conditions