A national survey by Eric Campbell, PhD and co-authors asked oncologists about views regarding Medicinal Cannabis' (MC) risks/benefits, and whether they had sufficient knowledge to make MC recommendations clinically.  Testing of the survey instrument suggested that physicians did not always feel that they possessed adequate MC knowledge in all domains, so Don't Know options were added to six of 27 survey items. The DKs appear to be valid responses, improving data quality by providing some respondents with an answer category that best fits their “true” answer. Read article>>