Study	Reason for exclusion
Chang 2014	Phase 1 dose‐escalation trial to assess the safety and feasibility of a single, intratracheal transplantation of human umbilical cord blood‐derived mesenchymal stem cells in 9 preterm infants at high risk for bronchopulmonary dysplasia. ClinicalTrials.gov identifier NCT01297205
Rudnicki 2015	Not focused on mesenchymal stem cells and bronchopulmonary dysplasia. Single‐center, prospective study of the feasibility, safety, and tolerability of autologous whole cord blood transplant in preterm infants born at less than 32 weeks of gestational age who developed anemia of prematurity. ClinicalTrials.gov identifier NCT02050971