[1] Univ Sao Paulo, Surg Dept, Stem Cell Lab, Sch Vet Med, Sao Paulo, Brazil
[2] Univ Sao Paulo, Obstet Dept, Sch Arts Sci & Humanities, Sao Paulo, Brazil
[3] Univ Calif San Diego, Dept Pediat, Rady Childrens Hosp San Diego, Sch Med,Stem Cell Program, La Jolla, CA 92093 USA
[4] Univ Calif San Diego, Dept Cellular & Mol Med, Sch Med, Stem Cell Program, La Jolla, CA 92093 USA