One patient developed a post-operative UTI (urinary tract infection, grade 2 according to SAVES v-2), resulting in a length of stay (LOS) increase of 4 days; another patient developed UTI and SIADH (syndrome of inappropriate antidiuretic hormone ADH release, grade 2 SAVES v-2), resulting in an LOS increase of 10 days. The gene discussed is AVP; the disease is bacterial urinary tract infection.