Source Date: April 23, 2009 Author: Stacey Burling Philadelphia Inquirer WHEN GWEN DARIEN was treated for non-Hodgkin's lymphoma 15 years ago, no one gave much thought to how she might feel if she lived. "Everything was focused on treating the disease and getting the cancer out of your body," said Darien, now director of survivor and patient advocacy at the Philadelphia-based" American Association for Cancer Research. Long-term survival after cancer treatment was still so unusual that no one considered that the radiation and chemotherapy she received might cause side effects years later. No one talked to her about work or the…