"Holocaust Survivors Nightmare" states, "For the next 35 years, the horrors he saw went unsaid, but were ever present in his life. Knoller suffered from nightmares and often woke in the night with great fear and panic, believing he was back in Auschwitz. He tried to ignore the nightly horrors."
-https://docs.google.com/document/d/1i5vt4ZT0MJL_xMM--ATSaxQI34hR4JYN_lkx9CFH4Ec/edit?tab=t.0