Line about "accross solid food boundary"

[kescobo]

The line in the intro:

Nevertheless, since this transition coincides with critical neural developmental windows and neural synaptogenesis, investigation across this solid-food boundary is incredibly important

@vanjakle says:

I keep coming back to this statement (which is great and should be kept here). Since we do before 6 mo and after 18 mo analysis, we need to address how our analysis addresses this.

[kescobo]

This is addressed in discussion