https://pmc.ncbi.nlm.nih.gov/articles/PMC6290285/
Premature Graying of Hair: Review with Updates - PMC
Premature graying of hair (PGH) is defined as graying of hair before the age of 20 years in Caucasians and before 30 years in African American population. It...
graying of hairprematurereviewupdatespmc