Some of the most important conclusions in epidemiologic research have come not from large case-control or cohort studies or clinical trials, but from case studies or case series, or as Dr. Frieden would say, "anecdotes."

The Rest of the Story

LAST：New arrival !!! VAN-CROOT unique style world cup mascot wooden electronic cigarette,wood ecigator ecig made in china wholesale |NEXT：Unique design China hicig e cigarette watchcig electronic cigarette, 2014 new product e cigarette watchcig ecigator ecig