Answer:
The water bottle sign or configuration refers to the shape of the cardiac silhouette on erect frontal chest x-rays in patients who have a very large pericardial effusion. Typically the effusion has accumulated over many weeks to months (e.g. in patients with malignancy) and the pericardium has gradually stretched.
Answer:
The safety and effectiveness of vaccines are under constant study. Because vaccines are designed to be given routinely during well-child care visits, they must be extraordinarily safe. Safety testing begins as soon as a new vaccine is contemplated, continues until it is licensed, and is monitored indefinitely after licensure.
Explanation:
The speed of light in a vacuum is <span>299,792,458 meters/sec, or approximately 300,000 meters/second.
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According to productivity expert Odette Pollar, "to do more in a day, you must do less, not do everything faster." Pollar said that on the average if you spend not enough time and energy on those things you alone can do, you must look for tasks that others can and let them take over. Focus on the prize.<span>
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