L. Hasikova, J. Zavada, T. Serranova, P. Kozlik, K. Kalikova, L. Kotackova, J. Trnka, D. Zogala, K. Sonka, E. Ruzicka, and P. Dusek. Serum but not cerebrospinal fluid levels of allantoin are increased in de novo Parkinson's disease. npj Parkinson's Disease, volume 9, issue 1, April 2023. L. Hasíková, J. Závada, T. Serranová, L. Kotačková, P. Kozlík, K. Kalíková, J. Trnka, D. Zogala, K. Šonka, E. Růzička, and P. Dušek. Patients with {REM} sleep behavior disorder have higher serum levels of allantoin. Elsevier BV, volume 90, September 2021. L. Hasikova, J. Zavada, T. Serranova, L. Kotackova, P. Kozlik, K. Kalikova, J. Trnka, D. Zogala, K. Sonka, E. Ruzicka, and P. Dusek. The effect of tandem coupling of NicoShell and TeicoShell columns in sub/supercritical fluid chromatography on enantioresolution. Parkinsonism & Related Disorders, volume 90, 2021.