I wish to direct the reader to the same footnote multiple times (in different locations in the main text).
I have found solutions using \footenote{\label{}...} and, e.g., \footref{} or \footnotemark[\ref{note1}]. These solutions seem to fail when I use:
\documentclass[prl,amsmath,twocolumn,showpacs]{revtex4}.
I also don't seem to make it work when I use (I tried recompiling with the packages from scratch):
\usepackage{scrextend}
or
\usepackage{footmisc}.
How can I do that in the document class which I'm using?

revtex4or is the more recent versionrevtex4-1acceptable? Forrevtex4-1the problem is covered in How to refer to same footnote twice in REVTeX? – Dai Bowen Dec 05 '16 at 11:06