How to add multiple affiliations in the tikzposter class?

I've been working through the tikzposter class documentation, but so far I couldn't find any hint as to how add affiliation to multiple authors. For example:

Something like this isn't really working:

\affiliation{First Institution}{1}
\affiliation{Second Institution}{2}

\author{Firstauthor}{1}
\author{Coauthor}{2}
\author{Othercoauthor}{2}


Update: Somehow Gonzalo's solution is outputting this on my machine (OSX with TeXlive)

You can use the authblk package:

\documentclass{tikzposter}
\usepackage{authblk}

\title{The Title}
\titlegraphic{Logo}
\usetheme{Basic}

\author[1]{Author A}
\author[2]{Author B}
\author[2]{Author C}
\affil[1]{Department One, University One}
\affil[2]{Department Two, University Two}

\begin{document}

\maketitle

\block{BlocktitleA}{Blocktext}
\begin{columns}
\column{0.3}
\block{BlocktitleB}{Blocktext}
\column{0.7}
\block{BlocktitleC}{Blocktext}
\note{Notetext}
\end{columns}

\end{document}


An image showing part of the resulting title:

Update

To prevent some shifting for blocks in tikzposter, noticed in the edit to the question, one needs to do

\def\maketitle{\AB@maketitle}


A complete example:

\documentclass{tikzposter}
\usepackage{authblk}

\title{The Title}
\titlegraphic{Logo}
\usetheme{Basic}
\author[1]{Author A}
\author[2]{Author B}
\author[2]{Author C}
\affil[1]{Department One, University One}
\affil[2]{Department Two, University Two}

\makeatletter
\def\maketitle{\AB@maketitle}
\makeatother

\begin{document}

\maketitle

\block{BlocktitleA}{Blocktext}
\begin{columns}
\column{0.3}
\block{BlocktitleB}{Blocktext}
\column{0.7}
\block{BlocktitleC}{Blocktext}
\note{Notetext}
\end{columns}

\end{document}


The result:

• I just realised, that however working, I get the first of my blocks displaced to the middle of the poster when using authblk and a space between title and this first block of about one third of the poster... Are there any known incompatibilities? – emanjavacas Jan 29 '15 at 15:26
• @EnriqueManjavacas Not that I'm aware of. Can you please add to your question a simpe complete document (like the one in my answer) showing the undesired behaviour? – Gonzalo Medina Jan 29 '15 at 15:30
• actually the very same document that you posted produces the undesired output – emanjavacas Jan 29 '15 at 15:35
• @EnriqueManjavacas the exact code I posted or with some modification? You mentioned you added some space? – Gonzalo Medina Jan 29 '15 at 15:40
• I've just updated the output of your answer on my machine – emanjavacas Jan 29 '15 at 15:49