Bill consented to participate in a research study for an experimental drug. He was given a brief description of the study and of how he was selected to participate on a voluntary basis. His short and long-term risks were described, and how the data would be collected and made public in a printed publication. Bill agreed to participate in the study. Bill was not aware, however, that the study would be conducted an hour from his house. Can Bill withdraw from the study since he has already agreed to participate?
a. Yes, a participant in a study may terminate or withdrawal from the study at any time.b. No, Bill has agreed and signed a consent form. He must see the study through to the end.c. No, by signing the consent form, Bill has the responsibility to make every reasonable effort to participate.