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Marleen MJ van Greevenbroek*, Jian Zhang*, Carla JH Kallen, Paul MH Schiffers, Edith JM Feskens and Tjerk WA de Bruin
* Corresponding authors: Marleen MJ van Greevenbroek m.vangreevenbroek@intmed.unimaas.nl - Jian Zhang J.Zhang@kent.ac.uk
BMC Medical Genetics 2008, 9:36 doi:10.1186/1471-2350-9-36