the patients were randomized to one of the two single-dose cephalosporin regimens and by operative procedure groups that included hysterectomies , genitourinary procedures , gastrointestinal operations , and the `` '' other procedures '' '' category that was dominated by orthopedic cases , such as total joint replacements and open fracture reductions .
C0020699
hysterectomies
C0042066
genitourinary