HDAC inhibitors might induce ciHHV-6 reactivation. In ciHHV-6 HSCT recipients posttransplant viral load can estimate persistent host chimerism when the donor is ciHHV-6 negative.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6020801PMC
http://dx.doi.org/10.1182/bloodadvances.2018015982DOI Listing

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