In Auschwitz Dr Kremer1 was keeping a diary filled with the mundane detail of what he was having for lunch, when he turned the heating on, etc. He also made reference to "live extractions":

10 October 1942

Extracted and fixed fresh live material from liver, spleen and pancreas. Got prisoners to make me a signature stamp. For first time heated the room. More cases of typhus fever and Typhus abdominalis. Camp quarantine continues.