Sachs 1995 / SOFT-AAFS guidelines: hair grows ~1 cm/month; segmental analysis reveals chronological drug-use pattern over months; established for chronic-use confirmation + DFSA cases.
Sachs 1995 / SOFT-AAFS guidelines: hair grows ~1 cm/month; segmental analysis reveals chronological drug-use pattern over months; established for chronic-use confirmation + DFSA cases.