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Brunekreef B, Groot B, Rijcken B, Hoek G, Steenbekkers A, de Boer A.Brunekreef B, et al.Eur Respir J. 1992 Sep;5(8):930-5.Eur Respir J. 1992.PMID: 1426200
Havenga MJ, van Dam B, Groot BS, Grimbergen JM, Valerio D, Bout A, Quax PH.Havenga MJ, et al. Among authors: groot bs.Anal Biochem. 2001 Mar;290(2):283-91. doi: 10.1006/abio.2000.4966.Anal Biochem. 2001.PMID: 11237331