Sequence generation {16a}
All eligible and consenting sites will be randomly assigned to a sequence of models of care (APP-led or usual). All sites will begin the trial with a baseline period where no site is in the intervention arm. Then, during 6-week intervals, two sites (clusters) will move to the intervention arm with this timing randomized at the outset of the trial. After the third step in the sequence, all six sites will be in the intervention arm.