"Nobuko Tsutani,Yoshitoshi Tanaka","How can we specify the second use drugs from patent information?: R&D on the second use drugs may lead to further development of pharmaceutical industries","Portland International Center for Management of Engineering and Technology 2014 Conference; Infrastructure and Service Integration","Proceedings of Portland International Center for Management of Engineering and Technology 2014 Conference; Infrastructure and Service Integration",,,,"pp. 1397-1406",2014,July