Determinants of ureteral obstruction after percutaneous nephrolithotomy.

"Declarations Ethical approvalAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Conflict of interestHarry Lee declares that he has no conflict of interest. Heiko Yang declares that he has no conflict of interest. Patrick Martin-Tuite declares that he has no conflict of interest. Rei Unno declares that he has no conflict of interest. Fadl Hamouche declares that he has no conflict of interest. Justin Ahn declares that he has no conflict of interest. David Bayne declares that he has no conflict of interest. Marshall Stoller declares that he has no conflict of interest. Thomas Chi declares that he has no conflict of interest. Informed consentInformed consent was obtained from all individual participants included in the study. Conflict of interest Harry Lee declares that he has no conflict of interest. Heiko Yang declares that he has no conflict of interest. Patrick Martin-Tuite declares that he has no conflict of interest. Rei Unno declares that he has no conflict of interest. Fadl Hamouche declares that he has no conflict of interest. Justin Ahn declares that he has no conflict of interest. David Bayne declares that he has no conflict of interest. Marshall Stoller declares that he has no conflict of interest. Thomas Chi declares that he has no conflict of interest."

"Funding None."