Survey and demographic comparison between the public and professional groups by country.

1Participants passed the survey if all 14 choice task sets were completed and the correct diseases were selected for both fixed choice task set. 2Regions were: Midwest (Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, Wisconsin); Northeast (Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont); South (Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia, West Virginia); West (Alaska, Arizona, California, Colorado, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming). *Significant at p<0.001. +An additional Fisher’s exact test was conducted to take into account of the small sample size in some Provinces and Territories; the results remain unchanged with no statistically significant relationship between the study population and the national population distributions (p = 1.000).