“…Patients find the FDP inconvenient, and so it is not readily tolerated; therefore, the optimal method and duration of the FDP have been debated for many years 2–28. Shortening the duration of the FDP2,5,8,10,11,14,16,17,22 and adopting alleviated positioning, such as avoidance of the supine or face-up positioning by the patients,6–13,15,19,20,22–25,27,28 have been proposed and statistically compared with strict FDP 5,7–12,21–25,27,28. However, these studies lacked adherence controls, and the intervention was the advice given to the patients to maintain the positioning rather than the positioning itself 21.…”