As the obesity epidemic spreads around the world more people are suffering from acid reflux, likely increasing the number of those who will develop esophageal cancer, a new study suggests. In Norway, the prevalence of acid reflux, also called gastroesophageal reflux disease (GERD), has risen almost 50 percent in the past 10 years, say researchers led by Dr. Eivind Ness-Jensen, from the HUNT Research Center’s Department of Public Health and General Practice at the Norwegian University of Science and Technology in Levanger.