Disease Management Program or Usual Care in Patients With Stage III or Stage IV Lung Cancer, Pancreatic Cancer, Ovarian Cancer, or Colorectal Cancer, and Their Caregivers

colorectal cancer, lung cancer, ovarian cancer, pancreatic cancer, recurrent non-small cell lung cancer, recurrent small cell lung cancer, stage iiia non-small cell lung cancer, stage iiib non-small cell lung cancer, stage iv non-small cell lung cancer, extensive stage small cell lung cancer, recurrent pancreatic cancer, stage iii pancreatic cancer