RT Journal Article SR Electronic T1 Using umbilical cord blood stem cells for myocardial infarction and stroke is ethically challenging JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 97 OP 97 DO 10.7861/clinmedicine.10-1-97 VO 10 IS 1 A1 Susan Bewley A1 Judith Mercer YR 2010 UL http://www.rcpjournals.org/content/10/1/97.abstract