論文（英文）
An analysis of institutional effects in a multicenter cancer clinical trial: is it also plausible from the clinicians’ point of view?
Sakamoto J, Matsuyama Y, and Ohashi Y. An analysis of the institutional effects in a multicenter cancer clinical trial- Is it also plausible from the clnicians’ point of view-. Japanese Journal of Clinical Oncology. 1999; 29(8): 403-405.