When two Z-scores meet-analysis of exercise capacity of children and adolescents with Kawasaki disease by a new Z-score model of coronary artery and a new Z-score evaluating peak oxygen consumption : Coronary artery Z-score and peakVO2 Z-score in KD.

"Declarations Ethics approval and consent to participateThe study was conducted following the principles outlined in the Helsinki Declaration. Given that this was a retrospective study, we didn’t get extra informed consent from the participants and their family. However, the informed consent was obtained before performing the CPET after the purpose of the testing was explained to the participants and their families (verbal consent from participants and written consent from family members). This study was approved by the Institutional Review Board of Kaohsiung Veterans General Hospital (number: VGHKS17-CT11-11). Consent for publicationNot applicable. Competing interestsThe results of the present study do not constitute endorsement and this work disclosed no financial support from any foundation. All authors declared that there is no conflict of interest. Competing interests The results of the present study do not constitute endorsement and this work disclosed no financial support from any foundation. All authors declared that there is no conflict of interest."

"Funding No external funding for this manuscript."