Only arrows, letters and other pointers have been used on the figures. Symbols are uniform in size and style. Line drawings have been done in black ink on a white background. The same size of type has been used on each line drawing. Line drawings are submitted separately, as for other illustrations, and are not incorporated into the body of the text.
Drawings are either originals or print-outs from a laser printer.
Photocopies are not acceptable. Written permission has been obtained to republish any previously published illustrations, and a copy of the correspondence is provided. Each figure is accompanied by a descriptive legend. For histologic photomicrographs, the stain used and the original magnification are provided.