Evaluating the surgeon's stress when using surgical assistant robots. - Kazuhiro Taniguchi; Atsushi Nishikawa; Hiroaki Nakagoe; Tomohiro Sugino; Mitsugu Sekimoto; Kazuyuki Okada; Shuji Takiguchi; Morito Monden; Fumio Miyazaki (RO-MAN, 2007)