1. True or false? The peak incidence of stones is between ages 50 and 70. 2. True or false? Most patients who form a stone will never form another one. 3. Dysfunction of what anatomic structure in the...

1. True or false? The peak incidence of stones is between ages 50 and 70.

2. True or false? Most patients who form a stone will never form another one.

3. Dysfunction of what anatomic structure in the collecting system predisposes a patient to infection?