RT Journal Article SR Electronic T1 When should central venous catheters be changed in the intensive care unit? Should there be a rigid time-based protocol for doing so? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 994 OP 996 VO 68 IS 12 A1 Mette, Stephen A. YR 2001 UL http://www.ccjm.org/content/68/12/994.abstract AB