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Table 1 Descriptions of the data sets

From: Combining linkage data sets for meta-analysis and mega-analysis: the GAW15 rheumatoid arthritis data set

Sample Markers No. Pedigrees (No. affected individuals) No. markers Map
UK SNPs 157 (332) 2473 cM map 1
NARAC Illumina SNPs 725 (1637) 2364 base-pair position
ECRAF Microsatellites 88 (187) 872 cM map 2
Canada Illumina SNPs 59 (118) 2364 base-pair position