Have they not travelled in the land to see the nature of the consequence for those who were before them? Allah wiped them out. And for the disbelievers there will be the like thereof.
Times are computed by method; your mosque's timetable governs the adhan. Every text carries its source and grade. Nothing here is a fatwa, a prediction, or a substitute for a doctor: your own scholar decides what is contested, and the tradition itself says the practice is alongside treatment, never instead of it.