%0 Journal Article %T Cost-Effective Smartphone-Based Articulable Endoscope Systems for Developing Countries: Instrument Validation Study %A Moon, Youngjin %A Oh, Jeongmin %A Hyun, Jaeho %A Kim, Youngkyu %A Choi, Jaesoon %A Namgoong, Jeongman %A Kim, Jun Ki %J JMIR mHealth and uHealth %V 8 %N 9 %@ 2291-5222 %D 2020-09-10 %I JMIR Publications Inc., Toronto, Canada %~ DeepDyve