RT Journal Article SR Electronic T1 Re-consenting human subjects: ethical, legal and practical issues JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 656 OP 657 DO 10.1136/jme.2009.030338 VO 35 IS 11 A1 Resnik, D B YR 2009 UL http://jme.bmj.com/content/35/11/656.abstract AB