TEL AVIV, Israel — In the last months of World War II, Lola Kantorowicz tried her best to hide her pregnancy. She succeeded because most of the prisoners at the Bergen-Belsen concentration camp had bellies that were distended and bloated from extended starvation. As she went into labor in March 1945, the Russians were advancing through Germany, and Bergen-Belsen was in chaos. Her daughter, Ilana, was born on March 19, 30 days before the camp was liberated by the British. Now 81, Ilana