The tiny spaces providing porousness to the cancellous bone are called:

An ICD-9-CM V code is used to code a(n):

A) disease. B) procedure. C) accident. D) non-illness condition. E) medication error.

The drugs of first choice in the treatment of intraocular hypertension and chronic open-angle glaucoma are the:

A. cholinesterase inhibitors B. beta-adrenergic blockers C. carbonic anhydrase inhibitors D. osmotic diuretics