Direct writing electrodes using a ball pen for paper-based point-of-care testing Li, Zedong ; Li, Fei ; Hu, Jie ; Wee, Wei Hong ; Han, Yu Long ; Pingguan-Murphy, Belinda ; Lu, Tian Jian ; Xu, Feng Abstract Publication: The Analyst Pub Date: 2015 DOI: 10.1039/C5AN00620A Bibcode: 2015Ana...140.5526L