Each figure should have a separate, fully explicit legend, and all sections of the figure and all abbreviations and symbols should be clearly defined. Figures must be planned so as to avoid wasting space. Coordinates should not extend appreciably beyond curves. It is not necessary for the scale on a coordinate to start at 0. For figures previously published elsewhere, written permission must be obtained for reproduction from the author and from the copyright holder.
References are to be numbered alphabetically and cited in text by number.
The reference section should be double-spaced at the end of the text, following the sample format given below. Journal titles should be abbreviated according to the abbreviations approved by Index Medicus. Single-word journal titles should be spelled out in full. Complete information should be given for each reference, including titles of journal articles, names of all authors and editors, and inclusive pagination. Journal article 1.