How to add some text between the author names and their affiliations?

Question

Below is a MWE:

\documentclass[12pt]{article}
\usepackage{authblk}
\begin{document}
\title{Title}
\author[1]{AuthorA}
\author[1*]{AuthorB}
\affil[1]{Institute Name}
\affil[*]{Address correspondence to: [email protected]}
\maketitle
\date{}
\begin{abstract}
QWERTYUIOP
\end{abstract}
\end{document}

The output is

What is want is to add a line "On behalf of the XYZ collaboration" between the "AuthorA and AuthorB" line and the "Institute Name" line. Can you please help?

Answer 1

You have to modify the source code since authblk has changed the definition of \@author.

\documentclass[12pt]{article}
\usepackage{authblk}
\makeatletter
\renewcommand\@author{\ifx\AB@affillist\AB@empty\AB@author\else
      \ifnum\value{affil}>\value{Maxaffil}\def\rlap##1{##1}%
    \AB@authlist\\[\affilsep]\behalf\\\AB@affillist
    \else  \AB@authors\fi\fi}
\makeatother
\begin{document}
\title{Title}
\def\behalf{On behalf of the XYZ collaboration}
\author[1]{AuthorA}
\author[1*]{AuthorB}
\affil[1]{Institute Name}
\affil[*]{Address correspondence to: [email protected]}
\maketitle
\date{}
\begin{abstract}
QWERTYUIOP
\end{abstract}
\end{document}