Is Pyrithione Zinc effective in treating seborrheic dermatitis?

Is Zinc Pyrithione considered effective in treating the symptoms of seborrheic dermatitis, and dandruff?

I will be concise here as the issue is explored at length in the article on pyrithione zinc.

“Shampoos containing zinc pyrithione (PZ) have been shown in many double-blind studies to be effective in controlling the clinically evident scaling in dandruff.”

Federal Register of FDA (1982) “Proposed Rules” for “OTC Drug Products for the Control of Dandruff, Seborrheic Dermatitis and Psoriasis; Establishment of a monograph” p.54664-54666