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(Top) Amount of membrane material in lipid-encapsulated Hb (LEH) and polylactic acid (PLA) nano-red blood cell (RBC); (middle) fate of polylactide membrane in PLA nano-RBC compared with PLA metabolism; (bottom) hemoglobin (Hb) concentration reported (Reprinted with permission from Ref 5. Copyright 2007 Taylor & Francis).
