Merge using consensus mode of plink. If genotype is not consistent between datasets it is put to missing.

 * sample missing rate 0.1 (removed 3 samples)
  * This is expected due to missing samples on some chips.
 * snp missing rate: 0.02 (failed variants 9,244)
 * maf 0.001 (failed variants 2)
 * 379,885 variants remaining
 * 1,268 samples remaining
 * Individual genotype callrate: 0.994411