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van den Broek KC, Martens EJ, Nyklícek I, van der Voort PH, Pedersen SS.van den Broek KC, et al. Among authors: martens ej.J Psychosom Res. 2007 Jul;63(1):41-9. doi: 10.1016/j.jpsychores.2007.03.014.J Psychosom Res. 2007.PMID: 17586336