منابع مشابه
It was time to go back.
I am a pediatric emergency physician in Calgary, Alta, and have been active in international health for more than 25 years. The last time I had been in Africa was in 1985 when I ran a district hospital in Lesotho in southern Africa. My husband and I had always wanted to return to the continent but career, children, and time got in the way. When those factors finally aligned, we were able to onc...
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Calcific aortic stenosis (AS) was initially characterized as a degenerative process (disorder) because of a tendency to describe any disorder that was not well understood and often occurred in the ‘elderly’ as degenerative. In the last ‘15–20’ years, the observation of the presence of risk factors for arterial atherosclerosis in patients with calcific AS, the production of aortic valve calcific...
متن کاملWhat was Fisher's fundamental theorem of natural selection and what was it for?
Fisher's 'fundamental theorem of natural selection' is notoriously abstract, and, no less notoriously, many take it to be false. In this paper, I explicate the theorem, examine the role that it played in Fisher's general project for biology, and analyze why it was so very fundamental for Fisher. I defend and Lessard (1997) in the view that the theorem is in fact a true theorem if, as Fisher cla...
متن کاملMarine sediments tell it like it was.
W e live in a constantly changing environment. Although some changes are natural and therefore beyond our control, there is no question that many anthropogenic activities have dramatically altered our planet. The ‘‘human footprint’’ is now discernable around the globe, so much so that Crutzen (1) proposed a new geological epoch (the Anthropocene) to delineate the recent human-dominated era of E...
متن کاملIt wasn't Witchcraft--It was Huntington Disease!
Huntington disease (HD) is an autosomal-dominant, incurable, progressive disorder that manifests with chorea and behavioral and cognitive impairment. The disease usually occurs during the fourth or fifth decade of life; however, it may present at any age. Clinical suspicion is confirmed by genetic testing. Death occurs, on average, 15 to 20 years after the onset of symptoms. Here we report abou...
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ژورنال
عنوان ژورنال: rus & avhengighet
سال: 1999
ISSN: 0809-2834
DOI: 10.18261/issn0809-2834-1999-02-08