experiences a little flutter in the tummy when the word 'plagiarism' is mentioned. It's all to easy to succumb to the temptation to take a slab of text from some obscure source and claim it as your very own, but you must resist.
It's an absolute cardinal sin, and all researchers are incensed when they see someone blithely laying claim to their work. Research of any kind can be very time-consuming, and medical research in particular may take several years to complete.
I'm afraid I don't have much sympathy for the doctor if that's what he did.