title: Letter regarding the article by Xue et al, "Functional integration of electrically active cardiac derivatives from genetically engineered human embryonic stem cells with quiescent recipient ventricular cardiomyocytes".
authors.forename: Richard B
authors.initials: RB
authors.lastname: Robinson
authors.forename: Michael R
authors.initials: MR
authors.lastname: Rosen
authors.forename: Peter R
authors.initials: PR
authors.lastname: Brink
authors.forename: Ira S
authors.initials: IS
authors.lastname: Cohen
mesh_terms: D000818:Animals; D005818:Genetic Engineering; D006168:Guinea Pigs; D009200:Myocardial Contraction; D032383:Myocytes, Cardiac / Q000637:transplantation; D015203:Reproducibility of Results; D033581:Stem Cell Transplantation; D014183:Transplantation, Heterologous