December 1 , 2005 South Korea's World Stem Cell Hub could become the leading center for stem cell and therapeutic cloning research, because of the chilling effect U.S. policy has had on stem cell research, according to Dr. Robert Lanza, Vice President for Medical & Scientific Development of Advanced Cell Technology, and Professor Ronald Green, Director of Dartmouth's Ethics Institute and chair of Advanced Cell Technology's Ethics Advisory Board, writing in the November 24th issue of the scientific journal Nature. "It reflects how far the United States has fallen behind its competitors in this pivotal area and how much the lack of federal leadership has handicapped US efforts," allege Lanza and Green.