Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Atenolol:

"

Atenolol has been given as an example of how slow healthcare providers are to change their prescribing practices in the face of medical evidence that indicates that a drug is ineffective.[1] In 2012, 33.8 million prescriptions were written to American patients for this drug.[1] In 2014, it was in the top (most common) 1% of drugs prescribed to Medicare patients.[1] Although the number of prescriptions has been declining steadily since the evidence against its efficacy was published, it has been estimated that it would take 20 years for doctors to stop prescribing it for hypertension.[1]