Sugimoto M, Takagi T, Suzuki R, Konno N, Asama H, Sato Y, Irie H, Watanabe K, Nakamura J, Kikuchi H, Waragai Y, Takasumi M, Hashimoto M, Hashimoto Y, Hikichi T, Ohira H. Push vs pull method for endoscopic ultrasound-guided fine needle aspiration of pancreatic head lesions: Propensity score matching analysis. World J Gastroenterol 2018; 24(27): 3006-3012 [PMID: 30038467 DOI: 10.3748/wjg.v24.i27.3006]