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Kok FJ, Van Duijn CM, Hofman A, Van der Voet GB, De Wolff FA, Paays CH, Valkenburg HA.Kok FJ, et al.Am J Epidemiol. 1988 Aug;128(2):352-9. doi: 10.1093/oxfordjournals.aje.a114975.Am J Epidemiol. 1988.PMID: 3394701
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Kok FJ, de Bruijn AM, Vermeeren R, Hofman A, van Laar A, de Bruin M, Hermus RJ, Valkenburg HA.Kok FJ, et al.Am J Clin Nutr. 1987 Feb;45(2):462-8. doi: 10.1093/ajcn/45.2.462.Am J Clin Nutr. 1987.PMID: 3812345Clinical Trial.
Bukkens SG, de Vos N, Kok FJ, Schouten EG, de Bruijn AM, Hofman A.Bukkens SG, et al. Among authors: kok fj.J Am Coll Nutr. 1990 Apr;9(2):128-35. doi: 10.1080/07315724.1990.10720361.J Am Coll Nutr. 1990.PMID: 2187027Review.