Assertion: obstruction's cause | /r/HasProperty | trauma
Facets:
Source sentences:
text: The most frequent cause is trauma, either sudden (as in a clavicle fracture caused by a car accident), or repetitive (as in a legal secretary who works with his/her hands, wrists, and arms at a fast paced desk station with non-ergonomic posture for many years)[citation
text: One cause of arterial compression is trauma, and a recent case involving fracture of the clavicle has been reported.