Yet, to say simply that everything is would not adequately distinguish relevant differences in ways, even if not degrees, of being. (religion-online.org)
Despite this large number of trials, it is still not clear whether there are clinically relevant differences between these therapies. (ebmh.bmj.com)
So, it is also possible that there could be socioeconomic or other relevant differences among health care facilities that have not been measured. (sciencedaily.com)