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DSC thermograms of (a) mannitol, hydroxypropilcellulose (HPMC), hyaluronic acid (HA) powder (pow), physical mixture (pmix), and freeze-dried matrix (fd) of HPMC/HA (total polymer concentration 25 wt %; mannitol 75 wt %) and (b) trehalose, physical mixture (pmix), and freeze-dried matrix (fd) of HPMC/T2/HA (total polymer concentration 25 wt %; trehalose 50 wt %; mannitol 25 wt %).
