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Wikström E, Bloigu A, Ohman H, Hiltunen-Back E, Virtanen MJ, Tasanen K, Paavonen J, Lehtinen M, Surcel HM.Wikström E, et al. Among authors: ohman h.Sex Transm Dis. 2012 Dec;39(12):968-72. doi: 10.1097/OLQ.0b013e31826e8720.Sex Transm Dis. 2012.PMID: 23191952