National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine research support non-u.s. gov't female male aged Comparative Study Prospective Studies Multicenter Study anti-bacterial agents / therapeutic use length of stay outcome assessment anti-bacterial agents / administration & dosage* cost-benefit analysis* anti-bacterial agents / economics anti-bacterial agents / pharmacokinetics gram-negative bacterial infections / metabolism aminoglycosides gram-negative bacterial infections / drug therapy pmid:10051056 doi:10.1097/00007691-199902000-00010 n a van lent-evers r a mathôt a a vinks drug monitoring / economics drug monitoring / methods gram-negative bacterial infections / economics health care*