Letters to the Editor

19319

Your article says, correctly, that our research group performed ultrasound of the main blood vessel of the women’s arms as a measure of vessel-cell function throughout the body. However, we identified women at risk of preeclampsia by performing ultrasound tests to assess blood-flow restriction of arteries in the uterus during the second trimester of pregnancy. […]

19241

I’m doing an elk-calf mortality study in Yellowstone National Park. We can differentiate between scavenging and predation only by such evidence as signs of struggle at the scene, a trail of blood, evidence of a chase, and the pattern of flesh wounds. We cannot make the determination based on bone-consumption pattern alone. Therefore, I question […]

19318

In regard to natural causes of coal fires, another cause not mentioned in the article involves the oxidation of pyrite, an iron sulfide that commonly occurs in coal beds.