Lanza LL, McQuay LJ, Rothman KJ, Bone HG, Kaunitz AM, Harel Z, Ataher Q, Ross D, Arena PL, Wolter KD. Comment on journal review of 'Use of depot medroxyprogesterone acetate contraception and incidence of bone fracture'. J Fam Plann Reprod Health Care. 2013 Oct;39(4):306. doi: 10.1136/jfprhc-2013-100759
Michels KB, Rothman KJ. Update on unethical use of placebos in randomised trials. Bioethics. 2003 Apr;17(2):188-204.