In 1998, Medicare issued reimbursement rules that allowed reimbursement for teleconsultations in rural health professional shortage areas.

In the lung's alveoli, there are four gases mixed together: O2, carbon dioxide, nitrogen, and water vapor

At a normal barometric pressure of 760 mm Hg, alveolar O2 exerts a partial pressure of 100 mm Hg, CO2 40 mm Hg, and water vapor 47 mm Hg. What is the alveolar partial pressure of nitro-gen? a. 187 mm Hg b. 713 mm Hg c. 660 mm Hg d. 573 mm Hg

Calculating measures of association with ____ rates is the best method.

A. specific B. crude C. adjusted D. attributable