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Bernaards CM, Twisk JW, Van Mechelen W, Snel J, Kemper HC.Bernaards CM, et al. Among authors: snel j.Med Sci Sports Exerc. 2003 May;35(5):793-800. doi: 10.1249/01.MSS.0000064955.31005.E0.Med Sci Sports Exerc. 2003.PMID: 12750589
Twisk JW, Snel J, Kemper HC, van Mechelen W.Twisk JW, et al. Among authors: snel j.Psychosom Med. 1998 May-Jun;60(3):372-7. doi: 10.1097/00006842-199805000-00027.Psychosom Med. 1998.PMID: 9625228
van Mechelen W, Twisk JW, Kemper HC, Snel J, Post GB.van Mechelen W, et al. Among authors: snel j.Public Health Nutr. 1999 Sep;2(3A):419-27. doi: 10.1017/s1368980099000579.Public Health Nutr. 1999.PMID: 10610082Review.