There are also various 1-2 year MS degree programs, often called "MS in biomedical sciences", which can function as a bridge into medical careers. Some are designed to prepare for MD or other professional school, while others have a focus on broader background (variety of subjects like anatomy, physiology, and pharmacology).
Another option is to learn on the side, and ask actual doctors to confirm/infirm theories and assess feasibility, but without credentials, it's easy to get dismissed...
A quick google search shows that Dr. José M. Mejía Oneto went to the University of Minnesota and did their residency at UC Davis. All this was done after their PhD in Chemistry from Emory.
I don't know if there's any other way to get medical training that will give you any level of authority or respect other than medical school (or related profession like PA or Nurse)
> CEO Dr. José M. Mejía Oneto, who has a PhD in organic chemistry and trained as a medical doctor
As an electronics PhD student with a growing interest in medical applications of my skills, how does one go about training as a medical doctor? Are there shortcuts one can take if not intending to practice? Though at this point, it seems to me that recognition/credentials is a bit orthogonal to building up knowledge.