Relationships of abdominal pain, reports to visceral and temperature pain sensitivity, conditioned pain modulation, and heart rate variability in irritable bowel syndrome. - Jarrett ME; Han CJ; Cain KC; Burr RL; Shulman RJ; Barney PG; Naliboff BD; Zia J; Heitkemper MM (Neurogastroenterology and motility, 2016)