A two year retrospective of interventions, resources, and costs associated with the clinical management of a hemotest positive stool in a large multi-specialty clinic with managed care and fee-for-service health insurance plans: J.I. Hughes, H.D. Chumchal-Baron, V.M. Heckel, Vercellino Gastrointestinal Cancer Institute of the Kelsey-Seybold Foundation for Medical Research and Education and The Gastroenterology Section of the Kelsey-Seybold Clinic Medical Group/Caremark, Houston, Texas