courses/20726/quizzes/87884/take/questions/2372822 In a case-control study of alcohol intake and bladder cancer, cases and matched controls are each interviewed by interviewers who are not blinded as to whether the subject is a case or a control. Many of the interviewers are in fact convinced that drinking alcohol is a cause of bladder cancer. Is this likely to represent a source of bias? If so, what could be done to improve this study? Explain your answer in two to three brief sentences