A short title for use as running head as well as the full address of the author to whom correspondence should be sent are also required. Please also supply phone and fax numbers, as well as your e-mail address. Whenever possible, use key words such as found in the headings of Index Medicus. Abstracts for Special Articles should not be structured. When essential, they are numbered consecutively and typed at the foot of the appropriate page.
Tables require a heading and figures a legend, also prepared on a separate sheet.
Due to technical reasons, figures with a screen background should not be submitted. On the back of each illustration, indicate its number, the author's name, and 'top' with a soft pencil. Standard deviations, instead of standard errors of the mean, are preferred. Color illustrations are reproduced at the author's expense. The list of references should include only those publications which are cited in the text.