controlled sodium chloride content diet (4 %) (for 14 days) then bilateral ovariectomy then 17 beta-estradiol (10 ug/d) (for 14 days)

 controlled sodium chloride content diet (0.4 %) (for 14 days) then sham surgical control condition then peanut oil (0.2 ml) (for 14 days)

 controlled sodium chloride content diet (4 %) (for 14 days) then sham surgical control condition then peanut oil (0.2 ml) (for 14 days)

 controlled sodium chloride content diet (0.4 %) (for 14 days) then bilateral ovariectomy then 17 beta-estradiol (10 ug/d) (for 14 days)

 controlled sodium chloride content diet (0.4 %) (for 14 days) then bilateral ovariectomy then peanut oil (0.2 ml) (for 14 days)

 controlled sodium chloride content diet (4 %) (for 14 days) then bilateral ovariectomy then peanut oil (0.2 ml) (for 14 days)