Regmi S, Seo Y, Ahn J-S, Pathak S, Acharya S, Nguyen TTien, Yook S, Sung J-H, Park J-B, Kim JOh, et al. Heterospheroid formation improves therapeutic efficacy of mesenchymal stem cells in murine colitis through immunomodulation and epithelial regeneration. Biomaterials. 2021;271:120752.