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[A] 1–7 day echogenic response of NBs stored at 4 °C and RT, reconstituted NBs stored at 4 °C. Stable middle layer of NB observed at 4 °C and RT and reconstituted NB at 4 °C. Intensity analysis of CE mode contrast exhibited by [B] NB at 4 °C [C] NB at RT and [D] Reconstituted NB at 4 °C (ns—not significant).
