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+#This script belongs to the paper of Ketelaar, Portelli, Dijk et al. 
+#Entitled 'Phenotypic and functional translation of IL33 genetics in asthma', submitted to JACI
+
+#Below example scripts for calculation of FDR of the results of the association analyses using R statistics
+#Core Team R. R: A language and environment for statistical computing. 2013; Available at: http://www.R-project.org/.
+
+
+# make a list of the files containing association results
+fdrfiles = list.files(pattern = "*.txt")
+p="P"
+names=fdrfiles
+
+for(file in fdrfiles){
+  # read-in file
+  contents = read.csv(file, sep = "\t", stringsAsFactors = FALSE, header = TRUE)
+  
+
+  # calculate fdr 
+ contents[,11] = p.adjust(p, "fdr", n=length(p))
+  
+  }
+
+# Write contents/results to a file:
+write.table(contents, file = names)