Letter: PGA: fact or artifact?
D000818:Animals; D006801:Humans; D008297:Male; D011454:Prostaglandins A / Q000302:isolation & purification*; D011458:Prostaglandins E / Q000302:isolation & purification*; D012661:Semen / Q000032:analysis*; D012756:Sheep
D011454:Prostaglandins A; D011458:Prostaglandins E