Leek, Jeffrey, Evan Johnson, Hilary Parker, Andrew Jaffe, and John Storey. (2012) 2012. “The Sva Package for Removing Batch Effects and Other Unwanted Variation in High-Throughput Experiments.”. Bioinformatics (Oxford, England) 28 (6): 882-3. doi:10.1093/bioinformatics/bts034. Reference Link