How to qualify PRP concentration/quality

[Ronnie210]

Hello all, I'm looking to get some PRP treatment to boost my H/T results.  Is there a gold standard for PRP treatment and what are the things I should be looking out for? 
-Is there a way to qualify the concentration of PRP (number of platelets)?
-What is the number of injections one should expect to receive in one session to cover front/mid/crown areas?
-How many sessions of PRP should be undertaken and at what frequency to achieve optimal results?
-Any other questions which should be asked ahead of this treatment?
I greatly appreciate your answers on this topic...Many thanks!

[shiba1985]

1) 4 - 6 x baseline platelets. 

2) in theory one injection per cm2. so usually should focus on a small area like 60cm2 or something. unrealistic to do the WHOLE scalp.  ( i think i may be wrong)

3) once a month for 3 months followed by every 6 months. if no results after 6-9 months then dont continue

4) ask the provider. have they assessed the quality of their prp. Do they activate it with anything prior to injecting. I feel like it should be activated for better results. not all providers do this.