Connecting the means in a dot plot

[Ben Littenberg]

I am asked to create a dot plot with two means on each line - one for group A and the other for group B. My collaborators want there to be a line connecting just the 2 means, but not extending below or above them. I can easily get a dotted line from 0 to maximum, but I don't see how to get it just from A to B. Here is what I have so far:

graph dot (mean) *_want, ///
    over(role,  relabel(1 "Mental Health*" 2 "Heat Illness*" 3 "Vector-borne Illness*" 4 "Air-quality*" ///
        5 "Pollen*" 6 "Storm/flood Trauma*" 7 "Storm/flood Illness*" 8 "Water-borne Illness*" 9 "Food-borne Illness*")) ///
    groupyvars ///
    ytitle("Percentage reporting resources would be moderately or very helpful", size(small)) ///
    legend(pos(4) ring(0) size(small)) ///
    subtitle("*P<0.05 for Physician vs. NP/PA", pos(7) span size(small)) ///
    name(want_db, replace)

Any suggestions? Thanks