In this section
we review the latest developments from the main PDF fitting groups.
%
We also discuss here the results from the PDF efforts carried out
within the LHC collaborations.
%
The comparison among these various
PDF sets is left for the next section.

\subsection{CT}\label{sec:pdfgroups.CT}

\input{5-pdfgroups/subsec-ct.tex}

\subsection{MMHT}\label{sec:pdfgroups.MMHT}

\input{5-pdfgroups/subsec-mmht.tex}

\subsection{NNPDF}\label{nnpdf}\label{sec:pdfgroups.NNPDF}

\input{5-pdfgroups/subsec-nnpdf.tex}

\subsection{ABM}\label{sec:pdfgroups.ABM}

\input{5-pdfgroups/subsec-abm.tex}

\subsection{CTEQ-JLab (CJ)}\label{sec:pdfgroups.CJ}

\input{5-pdfgroups/subsec-cj.tex}

\subsection{HERAfitter/xFitter}\label{sec:pdfgroups.xfitter}

\input{5-pdfgroups/subsec-xfitter.tex}

\subsection{PDF efforts by the LHC collaborations}\label{sec:pdfgroups.LHC}

\input{5-pdfgroups/subsec-exp.tex}
\label{sec:pdfgroups.ATLAS}
\label{sec:pdfgroups.CMS}
