RT Journal Article SR Electronic T1 Chi-square and Fisher’s exact tests JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP e20 OP e25 DO 10.3949/ccjm.84.s2.04 VO 84 IS 9 suppl 2 A1 Amy Nowacki YR 2017 UL http://www.ccjm.org/content/84/9_suppl_2/e20.abstract AB