Tumour tissue‐derived small extracellular vesicles reflect molecular subtypes of bladder cancer oleh Liang Dong, Mingxiao Feng, Morgan D. Kuczler, Kengo Horie, Chi‐Ju Kim, Zehua Ma, Kara Lombardo, Heather Lyons, Sarah R. Amend, Max Kates, Trinity J. Bivalacqua, David McConkey, Wei Xue, Woonyoung Choi, Kenneth J. Pienta