Antibody responses after sequential vaccination with PCV13 and PPSV23 in kidney transplant recipients.

"Declarations Conflict of interestThe authors declare that the research was conducted in the absence of any financial or non-financial relationships that could be construed as a potential conflict of interest. Institutional review board statementThe study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board of the University Hospital Essen, Germany (14–5858-BO). Conflict of interest The authors declare that the research was conducted in the absence of any financial or non-financial relationships that could be construed as a potential conflict of interest."

"Funding Open Access funding enabled and organized by Projekt DEAL. This research received no external funding. OW is supported by an unrestricted grant from the Rudolf-Ackermann-Stiftung (Stiftung für Klinische Infektiologie). The authors acknowledge support from the Open Access Publication Fund of the University of Duisburg-Essen."