TY - RPRT TI - Quality control guidelines for testing gram-negative control strains with polymyxin B and colistin (polymyxin E) by standardized methods. AU - Ronald N Jones AU - Tamara R Anderegg AU - Jana M Swenson AU - Quality Control Working Group PY - 2005 DO - 10.1128/jcm.43.2.925-927.2005 UR - https://pubmed.ncbi.nlm.nih.gov/15695708/ ID - 15695708 ER -