deletions | additions       diff --git a/materials_and_methods.tex b/materials_and_methods.tex  index 013b37f..ed2807a 100644  --- a/materials_and_methods.tex  +++ b/materials_and_methods.tex 
...
The geographical area of this study (20ºN to 70ºN, 10ºW to 70ºE) comprises Europe and the Irano-Turanian region. This area does not cover the entire known range of Neanderthals, which extended at least to Okladnikov in Southern Siberia \cite{Krause_2007}, but there is only one single Neanderthal record (Ust-Izhul, Siberia) attributed to MIS 5e beyond the Caspian Sea \cite{Rolland2010}, and therefore the data available would be too scarce to build a reliable model for this region.  We searched reviewed  the literature searching  for archaeological sites with Neanderthal fossil or lithic remains belonging to MIS 5e. Sites broadly attributed to MIS 5 were therefore excluded from our study. To reduce spatial clustering and pseudo-replication within the presence dataset we filtered the data applying a minimum distance of 100 km between nearby locations \cite{Guisan_2005}, which reduced the sample size to 25 presence records (see Fig. 1). \paragraph{Environmental variables} 
...