That depends on whether the doctors have been on industry funded vacations disguised as Learning to Prescribe Seminars, for example.

You can't make up stuff like that, but you can read about it in the relationship between Doctors and Big Pharma. 

Big Pharma used to buy Prescribing Profile Information from the BC College of Pharmacists, to allow them to target individual Physicians to influence their Prescribing Patterns. The BC Ministry of Health asked the College politely to stop, then made it an Order when they where still Peddling Prescribing Profile data a year later.