1. The Health and Safety Laboratory (HSL), Harpur Hill, Buxton, SK17 9JN, UK, e-mail: peter.stacey@hsl.gov.uk
2. INAIL, Italian Workers' Compensation Authority, Risk Assessment and Prevention Technical Advisory Office, via Roberto Ferruzzi 40, Rome, 00143 IT.
3. Adhesia, Oude Graanmarkt 10, Brussels, 1000 BE.
4. CSIR Centre for Mining Innovation, Human Factors Research Group, Pretoria, ZA.
5. NIOSH National Institute for Occupational Safety and Health, 4676 Columbia Parkway, MS R-7 Cincinnati, OH 45226 US.
6. IFA Institut für Arbeitsschutz der Deutschen Gesetzlichen Unfallversicherung, Alte Heerstraße 111, Sankt Augustin, 53757 DE.
7. INRS Institut National de Recherche et de Sécurité, Centre de Lorraine, Département Métrologie des Polluants, Laboratoire d'Analyses Inorganiques et de Caractérisation des Aérosols, Rue du Morvan, CS 60027, Vandoeuvre Les Nancy Cedex, 54519 FR.
8. The Health and Safety Laboratory (HSL), Harpur Hill, Buxton, SK17 9JN, UK.