RT Journal Article SR Electronic T1 Trial and error: challenges conducting pragmatic trials in general practice JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 54 OP 55 DO 10.3399/bjgp22X718289 VO 72 IS 715 A1 Katharine Ann Wallis A1 Carolyn Raina Elley YR 2022 UL http://bjgp.org/content/72/715/54.abstract AB