Start by checking to see what others are doing ... if they have done it ... how they did it ...
Selected Medical App Stores
Well, today we are going to look at three apps to see (probably) how they do it.
I made a sheet to help ...
( https://docs.google.com/document/d/1c5SRAXMKquzntDhaEYHO2R__sqTZuuJNBPqYgMBg2r4/edit )