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 Congenital pulmonary airway malformation:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

Three quarters of affected patients are asymptomatic. However, 25% develop cyanosis, pneumothorax, and show signs of increased breathing difficulty (tachypnoea and intercostal retractions). At examination, they may show hyper-resonance at percussion, diminished vesicular murmur and an asymmetrical thorax.[citation needed]