المؤلفون: Weiss, Rick, Holland, Jennifer S., Aguilera-Hellweg, Max

المصدر: National Geographic Magazine, 2005, Vol. 208, No. 1, P. 3.

Other Title: The Stem Cell Divide ; Stem Cells: How Far Will We Go

المؤلفون: Glausiusz, Josie

المصدر: National Geographic Magazine, 2011, Vol. 219, No. 3, P. 30.

Other Title: Grow Your Own Organs

المؤلفون: Swerdlow, Joel L., Luster, Bill

المصدر: National Geographic Magazine, 1991, Vol. 180, No. 3, P. 64.

Other Title: Medical Donors: A New Kind of Kinship

المؤلفون: Conant, Eve

المصدر: National Geographic Magazine, 2014, Vol. 225, No. 5.

المصدر: National Geographic Magazine, 1999, Vol. 196, No. 1.

المصدر: National Geographic Magazine, 1991, Vol. 180, No. 3, P. 93.