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Siegmann P, Álvarez-Fernández V, Díaz-Garrido F, Patterson EA.Siegmann P, et al.Opt Lett. 2011 Jan 1;36(1):10-2. doi: 10.1364/OL.36.000010.Opt Lett. 2011.PMID: 21209670
Siegmann P, Willutzki U, Fritsch N, Nyhuis P, Wolter M, Teismann T.Siegmann P, et al.Psychiatry Res. 2019 Mar;273:678-684. doi: 10.1016/j.psychres.2019.01.091. Epub 2019 Jan 29.Psychiatry Res. 2019.PMID: 31207852