In the following documentclass
\documentclass[prb,twocolumn,showpacs]{revtex4}
how to have italic and bold in a subsection title? The italic command removes the boldness when inside a subsection, so I tried the following :
\subsection{Short-range {\bf {\it vs}} long-range scattering}
It does not work. Any idea how to solve this? Maybe the documentclass has nothing to do with it, I did not check it.