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Prescriptions for the stimulant Adderall unchanged, but study led by Johns Hopkins Bloomberg School of Public Health researchers finds more nonmedical use and emergency room visits among adults.

Family and friends who help older people with health care are more likely to experience emotional, physical and financial difficulties.

Researchers at the Johns Hopkins Bloomberg School of Public Health say they have developed tiny “mini-brains” made up of many of the neurons and cells of the human brain – and even some of its functionality – and which can be replicated on a large scale.

Researchers have created a map of the world’s chemical landscape, a catalogue of safety data for 10,000 chemicals, that they say can predict the toxicity of many of the 90,000-plus substances in consumer products for which there is no such information.