Ampullary hypertrophy: malignant or benign?
D000777:Anesthetics; D004349:Drug Packaging / Q000592:standards*; D005283:Fentanyl / Q000031:analogs & derivatives*; D006801:Humans; D011786:Quality Control; D017409:Sufentanil
D000777:Anesthetics; D017409:Sufentanil; D005283:Fentanyl