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Particle size distribution of liposomes under different storage conditions: (A) 4 °C, 2 d (B) 37°C, 6 h (C) 65°C, 30 min and (D) 90°C, 1 min. (E) Changes in the RR of different temperatures of storage. The results are represented as the mean ± sd (n = 3). RR: retention rate.
