?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Bu&rft.au=Bu%2C+F&rft.aufirst=F&rft.issn=1472-6963&rft.date=4+November+2021&rft.title=BMC+Health+Services+Research&rft.volume=21&rft.atitle=How+is+patient+activation+related+to+healthcare+service+utilisation%3F+Evidence+from+electronic+patient+records+in+England&rft.genre=article