Jee Hyun Lee, et al. 14. Tisone G, Orlando G, Cardillo A, Palmieri G, Manzia TM, Bai- occhi L, et al. Complete weaning off immunosuppression in HCV liver transplant recipients is feasible and favourably impacts on the progression of disease recurrence. J Hepatol 2006;44:702-9. 15. Sebagh M, Rifai K, Féray C, Yilmaz F, Falissard B, Roche B, et al. All liver recipients benefit from the protocol 10-year liver biopsies. Hepatology 2003;37:1293-301. 16. Koshiba T, Li Y, Takemura M, Wu Y, Sakaquchi S, Minato N, et al. Clinical, immunological, and pathological aspects of opera- tional tolerance after pediatric living-donor liver transplantation. Transpl Immunol 2007;17:94-7. 788 Yonsei Med J http://www.eymj.org Volume 50 Number 6 December 2009