Risks associated with medical care are significant, as most diagnostic tests, drugs and treatments are not useful and many are harmful. The leading source of information for doctors on how to treat patients is drug representatives. The most common reason that doctors give is that it saves them from having to do their own research. Over 50% of doctors list Wikipedia as their first choice for where to find information about how to treat patients. Doctors also list YouTube videos posted on drug company websites as favorite sources for information, which are no better than Wikipedia. Wow.
Source: https://www.ncbi.nlm.nih.gov/pmc/
