A 15-year-old patient has a numb lower lip and pain in the right posterior mandible. A radiograph shows slight thickening of the periodontal membrane space of tooth no. 30 . The tooth shows slightly reduced vitality to electric pulp testing. Which of the following should be included in a differential diagnosis?

At a drill involving the rollover of a tourist bus, you have been assigned to the transport area. Which one of the following activities will you perform within this section?

A) Transport patients to the hospital or other appropriate facilities. B) Transfer patients to ambulances for transport to the hospital. C) Triage and assign priorities of EMS care and transport to the hospital. D) Triage and provide patient care prior to transport to the hospital.

Acquired chronic pure red cell aplasia is a rare disorder encountered in association with several autoimmune disorders. What does the mechanism appear to be?

a. B cell-mediated immunosuppression of neutrophils b. T cell-mediated immunosuppression of erythropoiesis c. Cytokine-mediated immunosuppression of erythropoiesis d. Increased serum erythropoietin