Search strategy
A systematic review was conducted in MEDLINE, EMBASE and Cochrane databases using a combination of Medical Subject Headings (MeSH) and free text as follows:
antenatal corticosteroid OR antenatal glucocorticoid OR antenatal steroid OR prenatal steroid OR dexamethasone OR betamethasone
AND
cardiovascular OR heart OR echocardiography OR blood pressure
Subsequently, a grey literature (first 100 hits in Google Scholar and Pubmed) search was performed, and reference lists of relevant review articles were manually checked. Forward citation searching was also performed, whereby key papers identified were located in Web of Science to identify other work where they may have subsequently been cited; references of these papers were also checked. Covidence software (Veritas Health Innovation Ltd, Melbourne, Australia) was used to eliminate duplicate articles and manage study screening.