I'm not thinking of the light superficial HA fillers but the deeper and thicker volumising HA Fillers. Are the thicker HA fillers injected as deeply as sculptra? If so, is there a danger of them mixing with the sculptra either at the same time? Should there be a break of about a week or more between the injections? I know a doctor who waits 6 months between injections. I can't wait that long!