Blind: The subjects involved during the study don't know which study procedure they get. Should the study is double-blind, the researchers also do not know which treatment method a subject receives. You ought to request the sponsor or research coordinator if the research you are considering taking part in was https://clinicaltrialvolunteerreg68023.tusblogos.com/26702116/details-fiction-and-how-to-enroll-in-clinical-trials