Endothelial dysfunction in obstructive sleep apnea patients.

"Declarations Ethics approvalAll procedures performed in this study were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments. All subjects gave their written informed consent to participate in the study (Jagiellonian University Ethics Committee approval number 112.6120.2.2016). Consent to participateAll subjects gave their written informed consent to participate in the study. Consent for publicationAll subjects gave their written informed consent for publication. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was supported by grant no. N41/DBS/000521 from the Jagiellonian University Medical College, Kraków, Poland."