Randomized Placebo-Controlled, Double-Blind, Half-Head Study to Assess the Efficacy of Platelet-Rich Plasma on the Treatment of Androgenetic Alopecia.

Criteria (Maximum score)	Score
Randomization	1/2
Placebo	1/2
Blinding	2/2
Objective measurement	1/1
Sample size more than 21	1/1
Sample selection and allocation concealment	1/1
Economical	1/1
Conflict of interest	1/1
Withdrawal / Dropouts	1/1
	1/1
Co-Interventions	1/1
Acceptable theory	1/1
Total	13/15

Interpretation is as follows:
13-15	Excellent study with substantial evidence
10-12	Good study. Evidence sufficient for practice
7-9	Average Study. Use the evidence with caution
4-6	Weak Study. Evidence not suitable for practice
0-3	Just an anecdotal claim