gpmp_list: List whether patients had a recent GPMP (care plan)
In DavidPatShuiFong/dMeasureBillings: Billings module for dMeasure

List whether patients had a recent GPMP (care plan)

gpmp_list(
  dMeasureBillings_obj,
  appointments = NULL,
  months_min = 0,
  months_max = 12
)

`dMeasureBillings_obj`	dMeasureBillings R6 object
`appointments`	dataframe of appointments $InternalID and $Date if no parameter provided, derives from $appointments_filtered
`months_min`	minimum age in months (inclusive, 'from')
`months_max`	maximum age in months (exclusive, 'up to')