Medical and Surgical @ Gastrointestinal System @ Removal @ Upper Intestinal Tract @ Via Natural or Artificial Opening Endoscopic @ Nonautologous Tissue Substitute
medical and surgical @ gastrointestinal system @ removal @ upper intestinal tract @ via natural or artificial opening endoscopic @ nonautologous tissue substitute
Medical and Surgical @ Gastrointestinal System @ Removal @ Upper Intestinal Tract @ Via Natural or Artificial Opening Endoscopic @ Nonautologous Tissue Substitute
medical and surgical @ gastrointestinal system @ removal @ upper intestinal tract @ via natural or artificial opening endoscopic @ nonautologous tissue substitute