Article

\documentclass[11pt,letterpaper]{article}

\usepackage[letterpaper,margin=1in]{geometry}

\usepackage[backend=biber,style=numeric,sorting=none]{biblatex}
\addbibresource{main.bib}

\usepackage[]{authblk}
\renewcommand\Affilfont{\itshape\small}

\usepackage{caption}
\usepackage{enumitem}
\usepackage{float}
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage{textcomp}


% No indentation
\setlength\parindent{0pt}

\pagenumbering{arabic}

% Title, authors and affiliations
\title{The latest shit}
\author[1]{Me}

\affil[1]{My Institute}

\begin{document}

\maketitle
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\begin{abstract}
  \input{./sections/abstract}
\end{abstract}

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\section{Introduction}
\input{./sections/introduction}

\section{Materials and Methods}
\input{./sections/materials_and_methods}

\section{Results}
\input{./sections/results}

\section{Conclusions}
\input{./sections/conclusions}

\section{References}
\printbibliography[heading=none]

\end{document}