All costs were provided by respondents in their local currency, and were converted into USD (US dollars) to facilitate comparison. Some respondents provided a range of prices (denoted by a vertical colored line) while others provided a single cost (denoted by a single diamond). For some countries, multiple respondents took the survey; as such, prices and ranges were combined. The average test price reported by respondents, approximately $874 USD, is denoted by a red horizontal dashed line. Countries are graphed from left to right in alphabetical order.