76 Therapeutic Cloning 6) Lanza, RP & Cibelli, JB & Blackwell, C & Cristofalo, VJ & Francis, MK & Baerlocher, GM & Mak, J & Schertzer, M & Chavez, EA & Sawyer, N & Lansdorp, PM & West, MD; “Extension of cell life-span and telomere length in ani- mals cloned from senescent somatic cells” in Science; (2000, Vol. 288); pg. 665–9