Nonetheless, Ying-Hui Fu with the University of California San Francisco says little is known about this basic human need.

而人们对人类这一最基本的需要还知之甚少。

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But a study by researchers at the University of California, San Francisco, says smoking could threaten this progress.

但是旧金山加利福尼亚大学的研究人员发表的一项研究表明，吸烟可能威胁到这一进展。

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University of California, San Francisco, researchers have long hunted genes related to how and when people sleep.

加州旧金山大学的研究人员一直在寻找与人们睡眠质量和时间有关的基因。

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Kirsten Bibbins-Domingo at the University of California San Francisco, was the lead author.

VOA: special.2010.01.27

Dr.Rebecca Smith-Bindman of the University of California San Francisco led a study of more than one thousand patients in four of the city's biggest hospitals.

VOA: standard.2010.01.30

Yet sleep scientist Ying-Hui Fu at the University of California, San Francisco,says little is known about the basic need for sleep.

VOA: special.2009.08.26

In the mid-1980s, Peter Goadsby, a neurologist and headache specialist at the University of California San Francisco, and his colleagues found that CGRP is released in migraines and that triptans decreased CGRP action.

WSJ: Fresh Target in Hunt for a Migraine Cure

Ding, Senior Investigator at the Gladstone Institute of Cardiovascular Disease and a professor at University of California San Francisco, is one of the scientists aiming to solve this problem by generating stem cells using chemical methods.

FORBES: Scientist Shows How Small Molecules Generate Better Stem Cells

The concept of farmers markets at hospitals is not entirely new, but it has started to spread -- to places like Mount Sinai Medical Center in New York, University of California San Francisco Medical Center in California, and the Vanderbilt Medical Center in Nashville, Tennessee, which opened its farmers market in May.

CNN: Farmers markets bloom at hospitals