Παραπομπή APA

Sibbald, B. (2002). US estrogen plus progestin HRT trial stopped due to increased risk of breast cancer, stroke and heart attack.

Παραπομπή Chicago Style

Sibbald, Barbara. US Estrogen Plus Progestin HRT Trial Stopped Due to Increased Risk of Breast Cancer, Stroke and Heart Attack. 2002.

Παραπομπή MLA

Sibbald, Barbara. US Estrogen Plus Progestin HRT Trial Stopped Due to Increased Risk of Breast Cancer, Stroke and Heart Attack. 2002.

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