迭代 \author 的逗号分隔参数

Question

如何定义一个接受逗号分隔参数、遍历参数并在参数之间插入一些命令或文本的宏？

例如，通过检查当前参数是否不是第一个。

我希望通过\mycommand{a,b,c}并获得a \and b \and c。

这是我使用的\author示例\and

\documentclass[]{article}

\usepackage{expkv-cs}

\ekvcHash\myauthor{author=,affiliation=,email=,}{%
  \begin{tabular}{ c }
    \ekvcValue{author}{#1}\\
    \ekvcValue{affiliation}{#1}
  \end{tabular}
}

% this macro should have comma separated arguments instead of three fixed arguments
\newcommand*{\myauthorslist}[3]{%
  \author{
    \myauthor{#1} \and \myauthor{#2} \and \myauthor{#3} % this should be done by iterating the arguments
  }
}

\begin{document}

\myauthorslist
  {author={Author1},affiliation={University of City1}}
  {author={Author2},affiliation={University of City2}}
  {author={Author3},affiliation={University of City3}}

\title{mytitle}
\maketitle

\end{document}

即传递如下参数：

\myauthorslist{
  {author={Author1},affiliation={University of City1}}
  ,{author={Author2},affiliation={University of City2}}
  ,{author={Author3},affiliation={University of City3}}
  % ...
}

更新：到目前为止我已经尝试过：

\documentclass[]{article}

\usepackage{expkv-cs}

\ekvcHash\myauthor{long author=,long affiliation=}{%
  \begin{tabular}{ c }
    \ekvcValue{author}{#1}\\
    \ekvcValue{affiliation}{#1}
  \end{tabular}
}

\ExplSyntaxOn
\NewDocumentCommand \myauthorslist { O{ \and } m } {
  \clist_use:nn { #2 } { #1 }
}
\ExplSyntaxOff

\begin{document}


\author{
  \myauthorslist{
    \myauthor{author={Author1},affiliation={University of City1}},
    ,\myauthor{author={Author2},affiliation={University of City2}}
    ,\myauthor{author={Author3},affiliation={University of City3}}
  }
}

\title{mytitle}
\maketitle

\end{document}

前面的方法可行。但我想不重复\myauthor，而是像下面这样调用它：

\author{
  \myauthorslist{
    {author={Author1},affiliation={University of City1}},
    ,{author={Author2},affiliation={University of City2}}
    ,{author={Author3},affiliation={University of City3}}
  }
}

但我不知道如何使用\myauthor。\myauthorslist以下不起作用：

\NewDocumentCommand \myauthorslist { O{ \and } m } {
  \clist_use:nn { #2 } { \myauthor{ #1 } } % <- this is not working!
}