Target Populations in Allogeneic Hematopoietic Cell Transplantation for Autoimmune Diseases— A Workshop Accompanying: Cellular Therapy for Treatment of Autoimmune Diseases, Basic Science and Clinical Studies, Including New Developments in Hematopoietic and Mesenchymal Stem Cell Therapy11Sponsored by the Bernie Marcus Foundation and the City of Hope National Medical Center, in Collaboration with NIAID, NCI, EULAR, and EBMT; Newport Beach, California; October 7, 2005