Randomized trial of estrogen plus progestin for secondary prevention of coronary heart disease in postmenopausal women. Heart and Estrogen/progestin Replacement Study (HERS) Research Group.
JAMA. 1998 Aug 19;280(7):605-13. doi: 10.1001/jama.280.7.605.
JAMA. 1998.
PMID: 9718051
Clinical Trial.