Rhus verniciflua stokes extract, a traditional herbal medicine, combined with first-line chemotherapy for unresectable locally advanced and metastatic pancreatic cancer: a prospective observational pilot study - Jin, Hayun; Lee, Su Hyeon; Kim, Eun Hye; Park, Su Bin; Park, Namyoung; Joo, Kwang Ro; Yoon, Seong Woo (Frontiers in Oncology, 2024)