From: A new strategy for enhancing imputation quality of rare variants from next-generation sequencing data via combining SNP and exome chip data
Reference panels
Exome chip
SNP chip
Combined
WES
21,120
4,472
24,514
WES + EXOME
38,243
7,323
41,637
WES + GWAS
23,972
344,359
364,402
WES + GWAS + EXOME
378,695
1KG
49,286
389,715