According to their epidemiologic factors, some measures were provided to prevent the hepatitis viruses coinfecting and superinfecting.

根据病毒性肝炎多重感染的有关流行因素，提出了一些预防病毒性肝炎多重感染的防制措施。

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Methods Orthogonal test design, a high effective research method of multifactors, was used to balance test study on the epidemiologic factors of the disease.

方法应用一种快速高效的多因素研究方法—正交试验设计，对该病的感染流行因素进行平衡试验研究。

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This article discusses etiologic and epidemiologic factors, diagnosis and prevention considerations, folk remedies, and common treatment options for the management of verruca.

本文讨论病因和流行病学因素，诊断和预防的考虑，民俗疗法，治疗选择和共同管理的疣。

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Second, in an ecologic analysis, one cannot control for confounding factors as one can in an analytic epidemiologic study.

FORBES: Will Removing Menthol From Cigarettes Improve Health?

Epidemiologic studies over the past 40 years have identified numerous risk factors for breast cancer, including: older age, an early age at menarche, a late age at first full-term birth, not having children, a family history of breast cancer in a first-degree relative, greater height, higher circulating estrogen levels, postmenopausal hormone use, breast density, history of breast biopsies, obesity (for postmenopausal breast cancer), and exposure to ionizing radiation.

FORBES: After 40 Years Of Research, What Do We Know About Preventing Breast Cancer?