M. Frølund, P. Lidbrink, A. Wikström, S. Cowan, P. Ahrens, and J. Skov Jensen, “Urethritis-associated Pathogens in Urine from Men with Non-gonococcal Urethritis: A Case-control Study”, Acta Derm Venereol, vol. 96, no. 5, pp. 689–694, Feb. 2016.