EMS presents with a 54-year-old female with chronic renal failure who did not go to dialysis yesterday because she was feeling too weak. She tells you to look in her medical record for a list of her current medications and past medical history. Her vital signs are all within normal limits.
Physical examination reveals a thin, frail woman in no acute distress. She has 3 small sores on her right leg; they are in various stages of healing. There is no sign of infection. The rest of her exam is normal.
Laboratory analysis shows that she has a normal urinalysis, CBC, and WBC; however, her zinc level is low. The rest of her blood work is within normal limits.
What concerning this condition is true?

A. It is very common in the United States.
B. Diagnosis is usually made by laboratory analysis.
C. Cardiac irregularities are common.
D. It is common in children.
E. It is responsible for fetal malformations.