SMS text pre-notification and delivery of reminder e-mails to increase response rates to postal questionnaires in the SUSPEND trial : a factorial design, randomised controlled trial
Citation
Starr , K , McPherson , G , Forrest , M & Cotton , S C 2015 , ' SMS text pre-notification and delivery of reminder e-mails to increase response rates to postal questionnaires in the SUSPEND trial : a factorial design, randomised controlled trial ' , Trials , vol. 16 , 295 . https://doi.org/10.1186/s13063-015-0808-9