INTRODUCTION

    Types of paper

    Contributions falling into the following categories will be considered for publication:

    Original research papers; review articles; rapid communications; short communications; viewpoints; letters to the Editor; book reviews.

    1.Research papers - original full-length research papers which have not been published previously,except in a preliminary form,and should not exceed 7,500 words (including allowance for no more than 6 tables and illustrations).

    2.Review articles - will be accepted in areas of topical interest,will normally focus on literature published over the previous five years,and should not exceed 10,000 words (including allowance for no more than 6 tables and illustrations).

    3.Rapid communications - an original research paper reporting a major scientific result or finding with significant implications for the research community,designated by the Editor.

    4.Short communications - Short communications of up to 3000 words,describing work that may be of a preliminary nature but which merits immediate publication. ......