Zhang, H., & Ying, C. (2011). Preparation of procyanidin B2 from apple pomace and its inhibitory effect on the expression of cyclooxygenase-2 in lipopolysaccharide-treated RAW264.7 macrophages. Bangladesh Journal of Pharmacology, 6(2), 106–110. https://doi.org/10.3329/bjp.v6i2.8915