Human urine on wood floors

[Stephani Horstman]

My wife and I are considering buying a home that was occupied by the same owner for over 50 years. The house smells like urine and after asking around, I've determined that it wasn't a pet but the elderly former owner. Ugh! I can handle animal urine, dealt with it multiple times but HUMAN URINE?! This is a first for me. 

It's on the main floor of the house, all wood floors. There are no stains, so we're looking at a whole floor treatment. Maybe I can rent someone's hound dog to sniff out the offending areas, but I'm not optimistic on that. :) The floors are nice and I'd like to not have to replace the whole first floor of them. Is there anyway to salvage this? Does hydrogen peroxide work on human urine? All of the enzyme products I've found are specific to either dog or cat, I can't find a single one for humans. 

Thank you so much for any experienced advice on this. I appreciate you taking the time to read my first ever post on BP!