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. Which of the following Dynamic International Prognostic Scoring System (DIPSS) or DIPSS plus risk categories is widely accepted indication for allogeneic hematopoietic cell transplantation for primary myelofibrosis?

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* 2. Which statement about chronic graft-versus-host disease (cGvHD) is correct?

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* 3. Which statement about ABO group types is correct?

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* 4. Which statement about refined Disease Risk Index (DRI) as developed by Armand and colleagues16 for allogeneic hematopoietic cell transplantation is correct?

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* 5. Which statement about marrow microenvironment is correct?

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