HIV can be spread by all modes except for which one?

Which of the following findings on the chest radiograph is considered a secondary sign of em-physema?

a. Flattening of the diaphragm b. Widening of the cardiac shadow c. Narrowing of the space between the ribs d. Blunting of the costophrenic angle

Available evidence has shown that bilevel pressure is associated with better patient compliance than the conventional CPAP

Indicate whether the statement is true or false.