The Importance and Fate of the Writings of Jewish Physicians in the Shadow of the Holocaust : The Case of Dr. Mordechai Lensky (1890-1964) - Physician, Holocaust Survivor, Historian, Literary Critic and Activist in Holocaust Commemoration - Offer, Miriam (Medical Care and Crimes in German Occupied Poland, 1939-1945 : New Findings, Interpretations and Memories)