Not that I work in the medical profession, but my first interaction with these pens was actually at my local doctor's office.
After playing around with one, the doctor thought it was cool I liked them and sent me home with it. Ended up using that pen through a little over 5 years before it finally ran out.
Nowadays, I usually get my own pens but since I was running out again (this now happens no less than every 2 years but often more like every six months) I asked my Santa to get exactly these from Amazon. And they sure delivered, even getting me a second one. Thank you!
madicetea