Anemic patients did not know about their condition during a testosterone trial. Renphoto/Getty Images hide caption

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Researchers Failed To Tell Testosterone Trial Patients They Were Anemic

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Several new studies show mixed results for men taking testosterone supplements. Garo/Phanie/Passage/Getty Images hide caption

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Does Testosterone Improve Older Men's Health? It Depends

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Research with living systems is never simple, scientists say, so there are many possible sources of variation in any experiment, ranging from the animals and cells to the details of lab technique. Tom Werner/Getty Images hide caption

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What Does It Mean When Cancer Findings Can't Be Reproduced?

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Karen Lorne, diagnosed with Lou Gehrig's disease in July, volunteers weekly with her certified therapy dog, Bailey, at the Ronald McDonald House in Chapel Hill, N.C. Courtesy of Karen Lorne hide caption

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Courtesy of Karen Lorne

Simplified Study Aims To Quickly Test A Long-Shot ALS Treatment

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Reviews Of Medical Studies May Be Tainted By Funders' Influence

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HHS Issues New Rules To Open Up Data From Clinical Trials

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When Pregnant Women Need Medicine, They Encounter A Void

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Putting experimental drugs to the test can be a way of life. Glow Wellness/Glow RM/Getty Images hide caption

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Professional 'Guinea Pigs' Can Make A Living Testing Drugs

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Stephane Schubhan, one of six men hospitalized after the clinical trial, still suffers from neurological damage. Jean-Francois Monier/AFP/Getty Images hide caption

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Clinical Trials Still Don't Reflect The Diversity Of America

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Glenn Lightner in 2012 at age 13. His father searched clinicaltrials.gov for years, to no avail, hoping to find a promising experimental cancer treatment that might save his son's life. Courtesy of Lawrence Lightner hide caption

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Courtesy of Lawrence Lightner

Results Of Many Clinical Trials Not Being Reported

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Nurses assist a new patient at an Ebola center in Liberia's Lofa County. As drug trials get underway, patients may receive experimental medicines. Tommy Trenchard/NPR hide caption

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Medical Experts Look For New Ways To Test Ebola Drugs

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