I found anecdotal evidence of this when researching nutritional medicine, as I followed the path of who researched what most academics career had switched track

I found anecdotal evidence of this when researching nutritional medicine, as I followed the path of who researched what most academics career had switched track to either start a nutritional medicine company practising the outcome of their research, whether for profit or protection, or had joined ranks with a traditional pharmaceutical company to work on their own product, regardless of the path no further work was published to the public.