Who should be called when you are unsure about security measures, both during and after office hours?

A direct blow to the chest at a vulnerable point in the cardiac cycle, leading to cardiac arrest is known as:

A) commotio cordis. B) ALTE. C) livor mortis. D) ventricular hypertrophy.

The cause of acquired idiopathic aplastic anemia is:

a. Epstein-Barr virus b. Chemicals such as benzene c. Radiation d. Unknown