Effects of a short message service (SMS) by cellular phone to improve compliance with fasting guidelines in patients undergoing elective surgery: a retrospective observational study. - Zia, Faizan; Cosic, Luka; Wong, Angela; Levin, Adam; Lu, Patrick; Mitchell, Craig; Shaw, Michael; Rosewarne, Fred; Weinberg, Laurence (BMC Health Services Research, 2021)