How many weeks' holiday a year are there? assolamarmite.org/stmap_58yegtem.html?silagra.levitra.thyroxine digoxin sandoz "I was surprised to see not a single reference to a real-world conflict that plausibly would not have occurred in the absence of observed climatic extremes. If the authors wish to claim a strong causal link, providing some form of case validation is critical."