More Unlabelled Data or Label More Data? A Study on Semi-supervised Laparoscopic Image Segmentation. - Yunguan Fu; Maria R. Robu; Bongjin Koo; Crispin Schneider; Stijn van Laarhoven; Danail Stoyanov; Brian R. Davidson; Matthew J. Clarkson; Yipeng Hu (DART/MIL3ID@MICCAI, 2019)