并排在乳胶束标题页

                 My Talk Title

John Foo (1)     Sarah Bar (2)   Isaac Foo (1)

                Foo University
                Foo, MA, 02134

                Bar Institute
                Bar, CA, 90210

但是我想换成这个:

                 My Talk Title

John Foo (1)     Sarah Bar (2)   Isaac Foo (1)

    Foo University         Bar Institute
    Foo, MA, 02134         Bar, CA, 90210

如有任何建议,将不胜感激。

编辑:以下是我使用的代码:

\documentclass{beamer}
\usetheme{Warsaw}

institute[Foo and Bar]{
  Foo University\\
  Foo, MA, 02134
  \and
  Bar Institute\\
  Bar, CA, 90210
}

\author{John Foo\inst{1} \and Sarah Bar\inst{2} \and Isaac Foo\inst{1}} 
\title[My Title]{My Talk Title}

\begin{document}

\begin{frame}[plain]  % 'plain' suppresses header & footer decorations
  \titlepage
\end{frame}

%% .. rest of presentation goes here

\end{document}