It was a dramatic end to a trial that pitted Notre Dame football coach Charlie Weis against two respected surgeons: a juror collapsed, the doctors rushed to his aid and the judge declared a mistrial. Some in the legal community thought Weis would then reach a settlement with the two Massachusetts General Hospital surgeons rather than go through a retrial. But with no settlement in sight, the former Patriots offensive coordinator is heading back to court this week for a second trial in a year on his claim that the surgeons botched his care after gastric bypass surgery in 2002. Jury selection is scheduled to begin Friday in Suffolk Superior Court.