There are more recent studies that surpases the 5 year mark, but none as detailed as the one Rossi did in 2012:
https://www.bernsteinmedical.com/re...-to-investigate-long-term-effects-and-safety/
After reading what Bernstein posted i suggest you to download the study and read it. Its pretty interesting, worth spending some time analyzing the data.
Among very good stuff you will find that more than 90% stayed above baseline after 10 years and 86% were equal or better at year 10 than year 5.
Also there is a 4 year study of avodart showing a 99.4% maintenance rate. Will try to find that one.
Back on topic, im all in for a non antiandrogenic treatment like Shiseido cellular therapy. Much more elegant, safe (lets hope) and convenient for all of us.