This call is more than annoying. They persist with the call until you answer. It's obvious it is a survey, but they don't warn you about the length. The questions started with political background ( about 4 minutes and went to drug companies, drugs and so on. The call lasted 18 minutes. I asked after 7 minutes if it was going to be much longer and was told it was almost done. This survey is very specific for them, not for common opinions. I will never do this for them again. If there is a next time, I will answer some questions and hang up, which makes their survey unusable.