Istituto Nazionale per la Salute Pubblica

http://stemcells.nih.gov/info/basics/pages/basics1.aspx

Cellule staminali: cosa sono e cosa fanno

http://www.mayoclinic.org/tests-procedures/stem-cell-transplant/in-depth/stem-cells/art-20048117

Cenni di base sulla ricerca sulle cellule staminali (AMA American Medical Association)

http://www.ama-assn.org/ama/pub/physician-resources/medical-science/genetics-molecular-medicine/related-policy-topics/stem-cell-research/basics-stem-cell-research.page