We sell high-end products to doctors in the UK. The brand is around gold and grey, with sepia photos featuring on the website. We emphasise high quality products. The tag line is "Luxury items to celebrate medical professionals." http://www.giftsfordoctors.co.uk
If you can picture the logo embroidered on an expensive jumper, then you're in the right area.
Possibly incorporate the caduceus (symbol for medicine) to emphasise that it is a medical brand.
After a day of feeding back, it seems I'm looking for 3 things:
1. GfD lettering - either subtly into the design, or originally designed lettering
2. Something subtly medical (e.g. end of a letter becomes a stethoscope - open to other ideas!)
3. Something classical and represents quality (e.g. wings either side - open to other ideas!)
With these 3 things I can show modern and classical with a medical twist.