For the sake of reproducibility, here’s a list of packages and their versions that were used to create this R markdown document.

devtools::session_info()
## Session info --------------------------------------------------------------
##  setting  value                       
##  version  R version 3.3.0 (2016-05-03)
##  system   x86_64, darwin13.4.0        
##  ui       RStudio (1.0.136)           
##  language (EN)                        
##  collate  en_CA.UTF-8                 
##  tz       America/Vancouver           
##  date     2017-02-18
## Packages ------------------------------------------------------------------
##  package              * version  date       source        
##  acepack                1.4.1    2016-10-29 CRAN (R 3.3.0)
##  annotate               1.50.1   2016-10-09 Bioconductor  
##  AnnotationDbi          1.34.4   2016-07-08 Bioconductor  
##  assertthat             0.1      2013-12-06 CRAN (R 3.3.0)
##  backports              1.0.5    2017-01-18 CRAN (R 3.3.2)
##  base64enc              0.1-3    2015-07-28 CRAN (R 3.3.0)
##  Biobase              * 2.32.0   2016-05-04 Bioconductor  
##  BiocGenerics         * 0.18.0   2016-05-04 Bioconductor  
##  BiocParallel           1.6.6    2016-08-15 Bioconductor  
##  bitops                 1.0-6    2013-08-17 CRAN (R 3.3.0)
##  car                    2.1-4    2016-12-02 CRAN (R 3.3.2)
##  caret                * 6.0-73   2016-11-10 CRAN (R 3.3.2)
##  checkmate              1.8.2    2016-11-02 CRAN (R 3.3.0)
##  cluster              * 2.0.5    2016-10-08 CRAN (R 3.3.0)
##  codetools              0.2-15   2016-10-05 CRAN (R 3.3.0)
##  colorspace             1.3-2    2016-12-14 CRAN (R 3.3.2)
##  cowplot                0.7.0    2016-10-28 CRAN (R 3.3.0)
##  crayon                 1.3.2    2016-06-28 CRAN (R 3.3.0)
##  data.table             1.10.4   2017-02-01 CRAN (R 3.3.0)
##  DBI                    0.5-1    2016-09-10 CRAN (R 3.3.0)
##  DESeq2                 1.12.4   2016-08-08 Bioconductor  
##  devtools               1.12.0   2016-06-24 CRAN (R 3.3.0)
##  digest                 0.6.12   2017-01-27 CRAN (R 3.3.2)
##  doMC                 * 1.3.4    2015-10-13 CRAN (R 3.3.0)
##  doParallel           * 1.0.10   2015-10-14 CRAN (R 3.3.0)
##  dplyr                  0.5.0    2016-06-24 CRAN (R 3.3.0)
##  evaluate               0.10     2016-10-11 CRAN (R 3.3.0)
##  forcats                0.2.0    2017-01-23 CRAN (R 3.3.2)
##  foreach              * 1.4.3    2015-10-13 CRAN (R 3.3.0)
##  foreign                0.8-67   2016-09-13 CRAN (R 3.3.0)
##  Formula                1.2-1    2015-04-07 CRAN (R 3.3.0)
##  genefilter             1.54.2   2016-05-16 Bioconductor  
##  geneplotter            1.50.0   2016-05-04 Bioconductor  
##  GenomeInfoDb           1.8.7    2016-09-02 Bioconductor  
##  GenomicRanges          1.24.3   2016-09-11 Bioconductor  
##  ggplot2              * 2.2.1    2016-12-30 CRAN (R 3.3.2)
##  ggrepel                0.6.5    2016-11-24 CRAN (R 3.3.2)
##  gridBase               0.4-7    2014-02-24 CRAN (R 3.3.0)
##  gridExtra              2.2.1    2016-02-29 CRAN (R 3.3.0)
##  gtable                 0.2.0    2016-02-26 CRAN (R 3.3.0)
##  highr                  0.6      2016-05-09 CRAN (R 3.3.0)
##  Hmisc                  4.0-2    2016-12-31 CRAN (R 3.3.2)
##  htmlTable              1.9      2017-01-26 CRAN (R 3.3.2)
##  htmltools              0.3.5    2016-03-21 CRAN (R 3.3.0)
##  htmlwidgets            0.8      2016-11-09 CRAN (R 3.3.2)
##  IRanges                2.6.1    2016-06-19 Bioconductor  
##  iterators            * 1.0.8    2015-10-13 CRAN (R 3.3.0)
##  knitr                  1.15.1   2016-11-22 CRAN (R 3.3.2)
##  labeling               0.3      2014-08-23 CRAN (R 3.3.0)
##  lattice              * 0.20-34  2016-09-06 CRAN (R 3.3.0)
##  latticeExtra           0.6-28   2016-02-09 CRAN (R 3.3.0)
##  lazyeval               0.2.0    2016-06-12 CRAN (R 3.3.0)
##  lme4                   1.1-12   2016-04-16 CRAN (R 3.3.0)
##  locfit                 1.5-9.1  2013-04-20 CRAN (R 3.3.0)
##  magrittr             * 1.5      2014-11-22 CRAN (R 3.3.0)
##  MASS                   7.3-45   2016-04-21 CRAN (R 3.3.0)
##  Matrix                 1.2-8    2017-01-20 CRAN (R 3.3.2)
##  MatrixModels           0.4-1    2015-08-22 CRAN (R 3.3.0)
##  matrixStats            0.51.0   2016-10-09 CRAN (R 3.3.0)
##  memoise                1.0.0    2016-01-29 CRAN (R 3.3.0)
##  mgcv                   1.8-17   2017-02-08 CRAN (R 3.3.2)
##  minqa                  1.2.4    2014-10-09 CRAN (R 3.3.0)
##  ModelMetrics           1.1.0    2016-08-26 CRAN (R 3.3.0)
##  munsell                0.4.3    2016-02-13 CRAN (R 3.3.0)
##  nlme                   3.1-131  2017-02-06 CRAN (R 3.3.2)
##  nloptr                 1.0.4    2014-08-04 CRAN (R 3.3.0)
##  NMF                  * 0.20.6   2015-05-26 CRAN (R 3.3.0)
##  nnet                   7.3-12   2016-02-02 CRAN (R 3.3.0)
##  pbkrtest               0.4-6    2016-01-27 CRAN (R 3.3.0)
##  pheatmap               1.0.8    2015-12-11 CRAN (R 3.3.0)
##  pkgmaker             * 0.22     2014-05-14 CRAN (R 3.3.0)
##  plyr                   1.8.4    2016-06-08 CRAN (R 3.3.0)
##  purrr                  0.2.2    2016-06-18 CRAN (R 3.3.0)
##  quantreg               5.29     2016-09-04 CRAN (R 3.3.0)
##  R6                     2.2.0    2016-10-05 CRAN (R 3.3.0)
##  randomForest         * 4.6-12   2015-10-07 CRAN (R 3.3.0)
##  RColorBrewer         * 1.1-2    2014-12-07 CRAN (R 3.3.0)
##  Rcpp                   0.12.9   2017-01-14 CRAN (R 3.3.2)
##  RCurl                  1.95-4.8 2016-03-01 CRAN (R 3.3.0)
##  readr                  1.0.0    2016-08-03 CRAN (R 3.3.0)
##  registry             * 0.3      2015-07-08 CRAN (R 3.3.0)
##  reshape2               1.4.2    2016-10-22 CRAN (R 3.3.0)
##  rmarkdown              1.3      2016-12-21 CRAN (R 3.3.0)
##  rngtools             * 1.2.4    2014-03-06 CRAN (R 3.3.0)
##  rpart                  4.1-10   2015-06-29 CRAN (R 3.3.0)
##  rprojroot              1.2      2017-01-16 CRAN (R 3.3.2)
##  RSQLite                1.1-2    2017-01-08 CRAN (R 3.3.2)
##  S4Vectors              0.10.3   2016-08-16 Bioconductor  
##  scales                 0.4.1    2016-11-09 CRAN (R 3.3.2)
##  SparseM                1.74     2016-11-10 CRAN (R 3.3.2)
##  stringi                1.1.2    2016-10-01 CRAN (R 3.3.0)
##  stringr                1.1.0    2016-08-19 CRAN (R 3.3.0)
##  SummarizedExperiment   1.2.3    2016-06-10 Bioconductor  
##  survival               2.40-1   2016-10-30 CRAN (R 3.3.0)
##  testthat               1.0.2    2016-04-23 CRAN (R 3.3.0)
##  tibble                 1.2      2016-08-26 CRAN (R 3.3.0)
##  tidyr                  0.6.1    2017-01-10 CRAN (R 3.3.2)
##  withr                  1.0.2    2016-06-20 CRAN (R 3.3.0)
##  XML                    3.98-1.5 2016-11-10 CRAN (R 3.3.2)
##  xtable                 1.8-2    2016-02-05 CRAN (R 3.3.0)
##  XVector                0.12.1   2016-07-22 Bioconductor  
##  yaml                   2.1.14   2016-11-12 CRAN (R 3.3.2)
##  zlibbioc               1.18.0   2016-05-04 Bioconductor