?:authorAffiliation
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[\'NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA. cheng@mail.nih.gov.\', \'NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.\', \'Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA.\', \'Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA.\', \'Department of Biomedical Engineering, University of Michigan Medical School, Ann Arbor, MI, USA.\']
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