Endoscopic full-thickness resection using a clip non-exposed method for gastrointestinal tract lesions: a meta-analysis oleh Olaya I. Brewer Gutierrez, Venkata S. Akshintala, Yervant Ichkhanian, Gala G. Brewer, Yuri Hanada, Maria P. Truskey, Amol Agarwal, Gulara Hajiyeva, Vivek Kumbhari, Anthony N. Kalloo, Mouen A. Khashab, Saowanee Ngamruengphong