Phase 1 study of EUS-guided photodynamic therapy for locally advanced pancreatic cancer - DeWitt, J M; Sandrasegaran, K; OʼNeil, B; House, M G; Zyromski, N J; Sehdev, A; Perkins, S M; Flynn, J; McCranor, L; Shahda, S (Gastrointest Endosc, 2019)