True or false, natural hairlines are 45-50 fu's per sq cm

[Dav7]

Hello, while doing a bit of browsing on the internet I came across

An anecdotal study presented by Coalition member Dr. Sharon Keene of AZ suggests that natural hairline density may be only around 45-50 FU/cm2. She presented an impressive power point presentation on this at the annual 2008 ISHRS (International Society of Hair Restoration Surgeons) conference in Montreal.

Is this true? I ask because I am hoping to get a HT next May or June and do not want to go above anything beyond 50fu's/cm2, or allow a surgeon to if that is the actual density of hairlines in none-MPB sufferers. Not only would I look a bit weird, but I would be wasting finite donor hair in the process for future purposes.

[rev3]

that number is usually noted as the density at which thinning is usually not perceived

[gillenator]

That sounds more like the average density for most individuals however native density can vary between individuals and even vary throughout the scalp.

If the surgeon can attain 50% of original native density, then the area should appear restored.

The goal of surgical hair restoration is to attain the "illusion" of coverage.