Bridging cultural gaps in quality assurance U. ÖrnemarkNick BoleyJean-Claude Libeer Editorial Pages: 138 - 139
Proficiency testing in analytical chemistry, microbiology, and laboratory medicine – working group discussions on current status, problems, and future directions U. ÖrnemarkNick BoleyE. W. B. De Leer Review Paper Pages: 140 - 146
An error model for evaluation and interpretation of proficiency testing Göran Nilsson General Paper Pages: 147 - 150
External quality assurance programmes in medical laboratories Jean-Claude Libeer General Paper Pages: 151 - 153
Microbiological proficiency testing: a personal perspective Keith Jewell General Paper Pages: 154 - 159
Uncertainty evaluation in proficiency testing: state-of-the-art, challenges, and perspectives Adriaan M. H. van der Veen Practitioner’s Report Pages: 160 - 163
Economy of proficiency testing: reference versus consensus values A. BaldanAdriaan M. H. van der VeenDerek Woods Practitioner’s Report Pages: 164 - 167
Anti-HIV quality assurance programs in Australia and the southeast Asian and Western Pacific regions A. GustSandy WalkerElizabeth M. Dax Practitioner’s report Pages: 168 - 172
Determination of hydrocarbons in water – interlaboratory method validation before routine monitoring P. WoitkeReinhard KreßnerPeter Lepom Practitioner’s Report Pages: 173 - 177
Experience with in-house PT-schemes in the chemical industry Rainer A. Schmidt Practitioner"s Report Pages: 178 - 180
Definition of assigned values for proficiency tests in water analysis M. KochJörg W. Metzger Practitioner’s report Pages: 181 - 185
Environmental analysis in the Czech Republic: organisation of proficiency testing and its use in laboratory assessment Eva KlokočníkováAlena NižnanskáI. Koruna Practitioner’s Report Pages: 186 - 189
Proficiency testing as tool for ISO 17025 implementation in National Public Health Laboratory: a mean for improving efficiency Zeev DveyrinHilla Ben-DavidAbraham Mates Practitioner’s report Pages: 190 - 194
Special issue of ”Química Analítica” devoted to ”Analytical Chemistry and Quality” M. ValcárcelA. Ríos Letter to the Editors Pages: 198 - 198
Information system and qualifying criteria for proficiency testing schemes Manfred Golze Policies and Concepts Pages: 199 - 202
Accreditation of providers of proficiency testing schemes Maree StuartAlan Squirrell Policies and Concepts Pages: 203 - 205
Interlinkages and recognition of proficiency-testing schemes Nick BoleyAdriaan van der VeenM. Golze Policies and Concepts Pages: 205 - 207
Proficiency testing in occupational and environmental health – Current practice and international initiatives for harmonisation J. M. ChristensenKirsten Byrialsen Policies and Concepts Pages: 207 - 210
Accreditation of proficiency-testing schemes in The Netherlands Petronella Mathilda van Berkel Policies and Concepts Pages: 210 - 213
International Symposium on Measurement Uncertainty in View of ISO 17025 Requirements, Budapest, Hungary, June 5–6, 2000 József Hlavay Meeting Report Pages: 215 - 215
Eighth International Symposium on biological and environmental reference materials (BERM-8) – Reference Materials for the 21st Century Wayne R. WolfM. Stoeppler Meeting Report Pages: 216 - 216
BERM – international symposia series on biological and environmental reference materials Markus Stoeppler International Bodies Pages: A195 - A195