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van den Merkhof LF, Zijlstra F, Olsson H, Grip L, Veen G, Bär FW, van den Brand MJ, Simoons ML, Verheugt FW.van den Merkhof LF, et al. Among authors: verheugt fw.J Am Coll Cardiol. 1999 May;33(6):1528-32. doi: 10.1016/s0735-1097(99)00038-8.J Am Coll Cardiol. 1999.PMID: 10334418Free article.