According to the Journal of Biomedical Informatics, Vol 46, February 2013, seventy-six percent of trials had publications describing trial results; of these, 74% were positive, 21% were neutral, and 4% were negative (harmful). Of unpublished studies for which the investigator responded, 43% were positive. Which of the following is represented by the results reported in the journal? Hawthorne effect Transparency O Publication bias Nothing