. . . . "Maruta" . . "units" . "Room 731" . . . . . . "human experimentation program" . "Japanese Unit 731" . "Japanese scientists" . . "medical experiments" . "Unit_731" . "Japanese biological warfare programme" . . "bio-experiments" . "Unit 731" . "Japanese Germ Warfare" . "human experimentation" . "731 unit" . "Unit 731" . . "a Japanese military unit" . "bacteriological research unit" . . . . . "vivisected by Japanese surgeons in medical experiments" . . . "bacteriological research units" . . .