00521nas a2200205   4500000000100000000000100001008004100002100001500043700001800058700001600076700001400092700001200106700001600118700001600134700001400150245011900164300001200283490000600295022001400301       2016                            d1 aE. Herrett1 aE. Williamson1 aT. Van Staa1 aM. Ranopa1 aC. Free1 aT. Chadborn1 aB. Goldacre1 aL. Smeeth00aText messaging reminders for influenza vaccine in primary care: a cluster randomised controlled trial (TXT4FLUJAB)  ae0100690 v6  a2044-6055