\documentclass[ignorenonframetext]{beamer}
\usetheme{Pittsburgh}
\setbeamercolor{normal text}{bg=red!7}
\usepackage{xmpmulti}
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% \documentclass[11pt,oneside]{article}
% \usepackage{beamerarticle,hyperref,a4wide}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%      
\input{featpostdocsource}