Under which class of medical devices would reagents for diagnostic tests for HIV, HCV, and HBV fall?

Most children would benefit from a radiographic examination within 12 months following the eruption of the first primary tooth

Indicate whether the statement is true or false

Physicians who specialize in the study, diagnosis, and treatment of digestive system diseases are known as:

A) gastrointestinalists. B) gastroenterologists. C) stomatologists. D) all of the above.