The potential for digital health in the UK --- from 'Intellect' the, "go-to organisation for the UK tech industry. It is the trade association for the UK's tech sector, which represents developers and suppliers of digital technology and services"
The digital health landscape diagram is not to scale but gives a good idea on how these sub-specialties are converging and overlapping. Description from nuviun.com. I searched for this on bing.com/images