Effectiveness of Polyethylene glycol (PEG) combined with linaclotide regimen for adequacy of bowel preparation in high-risk and chronic constipated patients undergoing colonoscopy: A Double -blinded randomized controlled trial by Vijayakumar C et al from Department of Surgery and Medical Gastroenterology . Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry , India- 605006