Unfiltered coffee increases plasma homocysteine concentrations in healthy volunteers: a randomized trial

by Grubben, M.J., Boers, G.H., Blom, H.J., Broekhuizen, R., de Jong, R., van Rijt, L., Katan, M.B.

The effect of unfiltered coffee on potential biomarkers for colonic cancer risk in healthy volunteers : a randomized trial

by Grubben, M.J.A.L., van den Braak, C.C., Broekhuizen, R., de Jong, R., van Rijt, L., de Ruijter, E., Peters, W.H., Katan, M.B., Nagengast, F.M.