Editorial: Withdrawal of Serial C and Serial 28.
D000818:Animals; D001315:Australia; D003276:Contraceptives, Oral; D004285:Dogs; D004335:Drug and Narcotic Control; D005260:Female; D006801:Humans; D008321:Mammary Glands, Animal; D008535:Megestrol / Q000633:toxicity*; D009369:Neoplasms / Q000139:chemically induced*
D003276:Contraceptives, Oral; D008535:Megestrol