How long does it take the HIV virus to develop into "full-blown AIDS" on average? A) 1-3 years
B) 10-12 years
C) 5-7 years
D) 16-19 years

Which of the following are considered general purposes of performing pulmonary function tests (pfts)? 1. the functional status of the lungs 2. the diffusion characteristics of the alveolar-capillary membrane 3. how much and how fast gas can be moved into and out of the lungs 4. the specific diagnosis of pulmonary disease