On behalf of the ASBMT Committee on Education, we are pleased to continue our monthly self-directed learning quiz "Basic Principles and Practices of Hematopoietic Cell Transplantation and Cell Therapy – Question and Answer Approach” for fellows in training, highlighting HCT and cell therapy topics. Answers to each question appear with evidence-based “non-exhaustive” peer-review commentary. Our aim is to provide you with a credible and freely available educational resource. Questions generated and reviewed by Syed Abutalib, MD, Mark R. Litzow, MD, and William A. Wood, MD.

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* 1. In what time frame does delayed hemolysis after minor ABO incompatible hematopoietic cell transplant tend to occur?

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* 2. Which is the predominant graft source among adults (age≥18 years) who receive unrelated donor transplants?

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* 3. What is the approximate 3-year probability of survival after HLA-matched sibling transplant in patients with chemosensitive diffuse large B cell lymphoma (DLBCL)?

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* 4. Which statement about infusion of thawed hematopoietic cell therapy product is CORRECT?

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* 5. Which of the differentiation cascade correctly reflect step-wise hierarchy of human stem and progenitor hematopoietic cells

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