custom_baseline: Pull smoothed Chicago NMMAPS health outcome data
Description
Example of a custom baseline function that can be passed to eesim or
power_calc.
By default, this function pulls smoothed data from the chicagoNMMAPS data set
in the dlnm package. The user may also input a different data set from which
to pull data. The function uses a smoothed function of this observed data as the
underlying baseline outcome trend in simulating data.