Salivary Research Unit, Dental Institute, King's College London, Floor 17 Guy's Tower, London, SE1 9RT, UK, Tel: +44 (0)20 7188 7461, Email: gordon.proctor@kcl.ac.uk
G.R. Holland
Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, The University of Michigan, 1011 N. University, Ann Arbor, MI 48109-1078, USA, Tel: (734) 763 3703, Fax: (734) 936 1597, Email: rholland@umich.edu