The characteristics, swelling ratio and water content percentage of chitosan-gelatin/limestone-based carbonate hydroxyapatite composite scaffold by Rianti, Devi, Fanny, Geo, Nathania, Rania Vivian, Purnamasari, Alqomariyah Eka, Putri, Rifayinqa Ruyani, Soekartono, Helal, Soebagio, Soebagio, Yuliati, Anita