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Arthur Caplan is the founding director of the Medical Ethics division of the Department of Population Health at the New York University School of Medicine. He has been involved in postmortem sperm retrieval cases for more than two decades.

Around 70 percent of the city's groundwater is contaminated by waste and chemicals from leaky household septic tanks and industrial plants that can cause diarrhea or other illnesses if the water is not boiled or purified properly.

As China's first market economy testing ground, Shenzhen has become a technology center and financial hub in recent years. With its favorable business environment, nearly 300 Fortune 500 companies have set up their China bases in Shenzhen.

Argentina's decrease in imports "is mainly explained by the sharp drop in the level of (economic) activity," and lower demand for manufactured goods from neighboring Brazil and the rest of the region, she added.

As Liu flew the Airbus A319 over Chengdu on May 14, the right-hand side of the cockpit window broke, and his co-pilot was almost sucked out. Liu landed the plane at the Chengdu airport, and all crew members and the 119 passengers are safe.