That's what they say, Pfizer has a history of bribing doctors, falsifying study results, and suppressing results they don't like[0].
If you really think that they're capable of completely falsifying results of multiple studies performed by various governments and research institutions around the world by way of bribing _everyone_ involved, you have a lot more confidence in their ability to successfully pull of a giant, complex, illegal operation without getting caught than I do.
This isn't to say that pharmaceutical companies don't engage in shady tactics when it comes to performing their own studies and bribing doctors, but this is a vastly different circumstance. They don't control these studies.