We purchased BSA from Sigma-Aldrich; KMnO4 from Sinopharm Chemical Reagent CO., Ltd. (Shanghai, China); DOX from Shanghai Aladdin Bio-Chem Technology CO., Ltd. (Shanghai, China); Daunorubicin (DNR) from Dalian Meilun Biotech Co., Ltd. (Dalian, China); Indocyanine green (ICG) from Tokyo Chemical Industry Co., Ltd. (Tokyo, Japan); Fetal bovine serum (FBS) from Elite (Marburg, Germany); Roswell Park Memorial Institute 1,640 (RPMI 1640) as well as 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) from Keygen Biotech Corp., Ltd. (Jiangsu, China). The Milli-Q system (Millipore, United States) purified the water. Other analytical grade chemicals were obtained from Sigma (St. Louis, United States) and utilized with no additional purification except as described elsewhere.
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