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A 54 year-old female with history of myelofibrosis was admitted for allogeneic stem cell transplant. Approximately one week after transplant, she developed mucositis, acute kidney injury, hypernatremia, and hyperchloremia. She developed neutropenic fever and infectious workup was significant for coagulase negative staphylococcus in urine. Ten days after transplant she began to develop hyperbilirubinemia and was ultimately found to have hepatic veno-occlusive disease. Twelve days after transplant she developed intermittent confusion. Her confusion became more continuous and she began attempting to remove her foley and IV lines. She became disoriented to year, reason for hospitalization, and developed sleep-wake cycle abnormalities, insisting on getting out of bed in the middle of the night but then becoming unsure of why she had gotten out of bed. What best represents the prevalence of delirium during hospitalization for hematopoietic stem cell transplantation?