Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Schmitt P Mandel J,A Comparison of Six Methods for Missing Data Imputation,Journal of Biometrics & Biostatistics,2155-6180,OMICS Publishing Group,2015,06,01,,https://cir.nii.ac.jp/crid/1360302869455891456,https://doi.org/10.4172/2155-6180.1000224