"and" in section title: "Apple and Pear" or "Apple & Pear"? In the main text of scientific papers, one should use and and avoid using &amp;.

I wonder if it still holds true in section titles.

Is


  Apple and Pear


or


  Apple &amp; Pear


more appropriate as a title?
Many journals specifically state what they expect, or often it can be ascertained by looking at their previous issues.