Seemingly untouched by Hollywood, they did not project the jadedness that is a common symptom of stardom.

NEWYORKER: Beyond the Matrix

Some conventional weapons or legal crowd control can also release smoke that causes respiratory problems, a common symptom of chemical weapons exposure.

CNN: Israeli official: Syria using chemical weapons

If you have acute pericarditis, the most common symptom is sharp, stabbing chest pain behind the breastbone or in the left side of your chest.

CNN: Pericarditis

The most common symptom of chronic pericarditis is chest pain.

CNN: Pericarditis

That hyper-vigilance is one common symptom of post-traumatic stress disorder.

CNN: The story