A review of hematopoietic stem cell transplantation for autoimmune diseases: multiple sclerosis, systemic sclerosis and Crohn's disease. Position paper of the Brazilian Society of Bone Marrow Transplantation Maria Carolina Oliveira; Juliana Bernardes Elias; Daniela Aparecida de Moraes; Belinda Pinto Simões; Morgani Rodrigues; Andreza Alice Feitosa Ribeiro; Lilian Piron-Ruiz; Milton Arthur Ruiz; Nelson Hamerschlak;