research Revised NPRT Classification System Encompasses Additional Patterns of Male and Female Hair Loss May 2020 in “Hair transplant forum international” The updated NPRT system now covers different types of hair loss in men and women.
research How I Do It: Ahmad’s NPRT System: A New Classification System for Documenting Male Pattern Baldness 1 citations , September 2016 in “Hair transplant forum international” Dr. Muhammad Ahmad created a simpler system to better describe male pattern hair loss.