A team of researchers is testing the effectiveness of a new HPV vaccine. They randomly divide the subjects into two groups. Group 1 receives new HPV vaccine, and Group 2 receives existing HPV vaccine. The patients were told which group they were in. Which is the treatment group? Group 1 Group 2 Neither group Which is the control group (if there is one)? Group 1 Group 2 No control group Is this study blind, double blind, or neither? Blind Double-blind Neither Which best describes this research? Experiment Survey Controlled Experiment Clinical Study Placebo Controlled Experiment

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