A comprehensive analysis of classification methods in gastrointestinal endoscopy imaging by Jha, D, Ali, S, Hicks, S, Thambawita, V, Borgli, H, Smedsrud, PH, de Lange, T, Pogorelov, K, Wang, X, Harzig, P, Tran, M-T, Meng, W, Hoang, T-H, Dias, D, Ko, TH, Agrawal, T, Ostroukhova, O, Khan, Z, Atif Tahir, M, Liu, Y, Chang, Y, Kirkerød, M, Johansen, D, Lux, M, Johansen, HD, Riegler, MA, Halvorsen, P