Changes

(1) The program thunder used in step 2 is an extension of MaCH, the genotype imputation software we have previously developed. For details regarding the shared options, please check out [http://csg.sph.umich.edu/csg/yli/mach/index.html MaCH website] and [http://genome.sph.umich.edu/wiki/Mach MaCH wiki].

(2) Check out example files and command lines under examples/thunder/ in the thunder package [https://csg.sph.umich.edu/csg/yli/thunder/thunder.V011.source.tgz thunder_glf_freq].