LCN2 and bacterial urinary tract infection: Reasons for excluding the papers included non-UTI studies (n = 6), animal/in vitro studies (n = 5), lack of NGAL data (n = 2), duplicated reports (n = 2), absence of non-UTI group (n = 13), recurrent UTI (n = 1), adult studies (n = 4), and review articles (n = 7).