Rothman KJ. Significance questing. Ann Intern Med. 1986 Jan 1;105(3):445-7. doi: 10.7326/0003-4819-105-3-445
Jick H, Porter J, Rothman KJ. Oral contraceptives and non-fatal stroke in healthy young women. Ann Intern Med. 1978 Jul;89(1):58-60.