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 Cardiomegaly:

"

The causes of cardiomegaly are not well understood and many cases have no known cause. Lifestyle-related risk factors include tobacco use and high cholesterol, high blood pressure, and some types of diabetes. Non-lifestyle risk factors include a family history of cardiomegaly, coronary artery disease (CAD), congenital heart failure, atherosclerotic disease, valvular heart disease, exposure to cardiac toxins, sleep-disordered breathing (such as sleep apnea), and sustained cardiac arrhythmias.[citation needed]