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The Journal of Biological Chemistry|January 15, 2001
Novel frameshift mutations near short simple repeatsW H van Den Hurk, H J Willems, M Bloemen, et al.Clinical Chemistry|March 1, 1981
Analysis for 1,25-dihydroxyvitamin D in human plasma, after a liquid-chromatographic purification procedure, with a modified competitive protein-binding assayM J Jongen, W J van der Vijgh, H J Willems, et al.Pharmaceutisch Weekblad. Scientific Edition|August 23, 1985
Determination of some anticonvulsants, antiarrhythmics, benzodiazepines, xanthines, paracetamol and chloramphenicol by reversed phase HPLCH J Willems, A Van der Horst, P N De Goede, et al.Clinical Chemistry|October 1, 1981
Simultaneous determination of 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, and 1,25-dihydroxyvitamin D in plasma or serumM J Jongen, W J van der Vijgh, H J Willems, et al.Journal of Pharmaceutical Sciences|June 1, 1985
Comparison of equilibrium dialysis, ultrafiltration, and gel permeation chromatography for the determination of free fractions of phenobarbital and phenytoinJ W Melten, A J Wittebrood, H J Willems, et al.Pageof 1