3. obstetrics the relation of an arbitrarily chosen portion of the fetus to the right or left side of the mother; with each presentation there may be a right or left position; the fetal occiput, chin, and sacrum are the determining points of position in vertex, face, and breech presentati...
International Journal of Gynaecology & Obstetrics. 2009; ... pmhdev - 《Centre for Reviews & Dissemination》 被引量: 106发表: 2009年 Mortality study of pesticide applicators and other employees of a lawn care service company. In response to reports linking non-Hodgkin's lymphoma (NHL) and ...
Dr. Kelly Martin is an epidemiologist and a member of Health Canada's Pest Management Review Agency. "Children are� at increased risk from pesticides," she says. "We have five or six good studies that show that if you use lawn pesticides on your lawn or garden one to four tim...