HRA

Any Australians out there may help me with this.

The other day I had two guys at the door with "HRA" on their shirts asking me if I was interested in some health issue. I said no and they left.

Can't find anything on Google about the organisation and am curious. Who are these guys?

Might be a bit thick or have poor sight because I have a "No Door To Door Traders" sign on my front door. Mind you JW's have trouble reading it also but I expect that.