The entrance and lounge area is modeled after Asia, so are the rooms for the x-rays and dental hygiene.
The administration area and two additional conference rooms are modeled after America. That is why you will find multiple grand pictures of cities like New York.
The two big treatment areas with multiple rooms and another dental hygiene room show motives from Oceania and Africa.
The consultation, diagnostic and physiotherapy area, as well as the laboratory portray Australia.