[webmaven]

Not my field, but I do know of studies that measure patient's satisfaction with medical treatment goes up when the provider wears a white coat rather than scrubs or business casual.

Some of these studies replicate the effect for veterinarians as well (the effect is on the pet owner, in those scenarios, though it would be amusing if such an effect could be demonstrated on pets' health outcomes).

I imagine that the halo of being exposed to multiple such markers (even indirect ones such as you've suggested) for professionalism and care will reinforce this effect, and so would repeated exposure, though all this suggests is that patients would be more likely to report that they feel their treatment is working, which might be different than an improvement in actual clinical outcomes.