R-Spondin 1 (RSPO1) increases mouse intestinal organoid unit size and survival in vitro and improves tissue-engineered small intestine formation in vivo - Levin, Gabriel; Zuber, Samuel M; Squillaro, Anthony I; Sogayar, Mari Cleide; Grikscheit, Tracy C; Carreira, Ana Claudia Oliveira (Frontiers in Bioengineering and Biotechnology, 2020)