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Coal tar - Wikipedia
Coal tar: What does it treat and is it safe to use? - Medical News …
Psoriasis treatment: Coal tar - American Academy of Dermatology
Coal Tar and Coal-Tar Pitch - Cancer-Causing Substances - NCI
Coal Tar for Psoriasis: Types, Effectiveness, Side Effects
Coal Tar (Topical Route) Description and Brand Names - Mayo Clinic
Coal Tar (Topical Route) Proper Use - Mayo Clinic
Coal Tar: Uses & Side Effects - Cleveland Clinic
About coal tar - NHS
Coal tar: a medicine to treat skin irritation - NHS