How did Corrie hid the Jews? Were there any problems while hiding them?

During 1943 and into 1944, there were usually 5-6 people illegally living in the Ten Boom home: some of whom were Jews and others members of the Dutch underground. Hidden behind a false wall in Corrie's bedroom were two Jewish men, two Jewish women and two members of the Dutch underground. It was difficult for these people to survive in such a small space.