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.”

References:

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