4. A 35 y/o white female presents to her primary care physician to establish care. A routine CBC was performed, which showed a microcystic anemia with a slightly increased MCHC. Upon further questioning, the patient stated that a surgeon wanted to take her spleen out many years ago, but she did not return to see the “quack.” Based on the clinical history, laboratory data, and peripheral smear images, what is the best diagnosis?