Corrigendum: Berberine and Oligomeric Proanthocyanidins Exhibit Synergistic Efficacy Through Regulation of PI3K-Akt Signaling Pathway in Colorectal Cancer - Okuno, Keisuke; Garg, Rachana; Yuan, Yate-Ching; Tokunaga, Masanori; Kinugasa, Yusuke; Goel, Ajay (Frontiers in Oncology, 2022)