clinical trial non-randomized clinical trial nonrandomized clinical trial https://github.com/obi-ontology/obi/issues/1891 A clinical trial in which the participants are not assigned by chance to different treatment groups. Participants may choose which group they want to be in, or they may be assigned to the groups by the researchers. Charles Tapley Hoyt Sebastian Duesing https://www.cancer.gov/publications/dictionaries/cancer-terms/def/nonrandomized-clinical-trial non-randomized clinical trial metadata complete