S1	(infant or infants or infantile or infancy or newborn* or "new born" or "new borns" or "newly born" or neonat* or baby* or babies or premature or prematures or prematurity or preterm or preterms or "pre term" or premies or "low birth weight" or "low birthweight" or VLBW or LBW)	426,815
S2	( (MH "Stem Cells+") OR stem cell transplantation OR "stroma cells" OR "stroma cell" OR "stem cell" OR "stem cells" ) OR ( “mesenchymal cell” OR “mesenchymal cells” OR “mononuclear cell” OR “mononuclear cells” OR “progenitor cell” OR “progenitor cells” OR “cord blood cell” OR “cord blood cells” OR “regenerative cell” OR “regenerative cells” OR "stromal cell" OR "stromal cells" )	41,467
S3	( (MH "Asphyxia Neonatorum") OR (MH "Hypoxia‐Ischemia, Brain+") ) OR ( brain injury OR neuro‐protect* OR neuro‐restorative OR neuroprotect* OR Asphyxia* OR Hypoxia OR Hypoxic OR Hypoxemia OR Hypoxaemia OR Ischemia OR Ischaemia OR ischaemic OR Ischaemic OR anoxia )	116,145
S4	randomised controlled trial OR controlled clinical trial OR randomised OR placebo OR randomised OR randomly OR trial	462,048
S5	(MH "Clinical Trials+") OR PT clinical trial	259,541
S6	S4 OR S5	472,952
S7	S1 AND S2 AND S3 AND S6	35