Supply tables, figures and Datasets on separate files, clearly labelled. Provide typed captions, including sources Each Table or Figure should be uploaded electronically using a separate file for each in either Word, TIFF or JPEG format. Please indicate where these should appear within the article e.g. Table 1 here etc.

Authors are asked to present tables with the minimum use of horizontal rules (usually three are sufficient) and avoiding vertical rules except in matrices. Colour is NOT used. It is important to provide clear copies of figures (not photocopies or faxes) which can be reproduced by the printer and do not require redrawing. Photographs should be preferably black and white glossy prints with a wide tonal range