AUTHOR=Ekpo Marlene Davis , Boafo George Frimpong , Xie Jingxian , Liu Xiangjian , Chen Chuanpin , Tan Songwen TITLE=Strategies in developing dimethyl sulfoxide (DMSO)-free cryopreservation protocols for biotherapeutics JOURNAL=Frontiers in Immunology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2022.1030965 DOI=10.3389/fimmu.2022.1030965 ISSN=1664-3224