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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