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Landman GW, van Hateren KJ, Kleefstra N, Groenier KH, Gans RO, Bilo HJ.Landman GW, et al. Among authors: gans ro.Br J Gen Pract. 2010 Mar;60(572):172-5. doi: 10.3399/bjgp10X483517.Br J Gen Pract. 2010.PMID: 20202363Free PMC article.