Type 1 diabetes affects approximately 2 million people in the US and 8.4 million people worldwide. Author Desmond Schatz, MD, of the University of Florida joins JAMA Deputy Editor Mary M. McDermott, MD, to discuss current evidence regarding diagnosis and treatment of type 1 diabetes.

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Mark Cuban, entrepreneur, investor, and cofounder of the Mark Cuban Cost Plus Drug Company, joins JAMA Editor in Chief Kirsten Bibbins-Domingo, PhD, MD, MAS, to discuss the role of pharmacy benefit managers, insurance formularies, and opaque pricing practices that shape how most Americans access prescription drugs. Hear why he thinks doctors are the good guys in a broken system.

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Opioid use disorder is the third most prevalent substance use disorder worldwide. Author Alexander Walley, MB, MSc, of Boston Medical Center and Boston University joins JAMA Deputy Editor Kristin Walter, MD, MS, to discuss the efficacy, safety, and practical considerations of treating patients with medications for opioid use disorder, opioid withdrawal, and opioid overdose.

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• Medications for Opioid Use Disorder, Opioid Withdrawal, and Opioid Overdose

Ovarian cancer may be prevented with removal of the fallopian tubes during pelvic or select abdominal surgery in eligible women. This procedure, opportunistic salpingectomy, can be offered to more eligible women. Author Jurgen M. Piek, MD, PhD, of the Catharina Cancer Institute discusses this and more with JAMA Deputy Editor Linda Brubaker, MD, MS.

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• Opportunistic Salpingectomy for Prevention of Tubo-Ovarian Carcinoma

IgA nephropathy is a chronic kidney disease involving deposition of IgA-containing immune complexes in the glomerulus, which often causes kidney failure within 10 to 20 years. Author Michelle Marie O'Shaughnessy, MB, BCh, BAO, MS, of Galway University joins JAMA Deputy Editor Kristin Walter, MD, MS, to discuss the symptoms, risk factors, diagnosis, treatment, and prognosis of IgA nephropathy in adults.

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Restless legs syndrome is a sleep-related neurologic disorder that causes an overwhelming urge to move the limbs, which can cause substantial sleep disturbance. Author John W. Winkelman, MD, PhD, of Harvard Medical School joins JAMA Deputy Editor Kristin Walter, MD, MS, to discuss the symptoms, risk factors, diagnosis, and treatment of restless legs syndrome.

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Mifepristone used with misoprostol is the most common abortion regimen in the US. It is also a focal point of reproductive health policy and politics, with controversy over its legal status and regulation by the US Food and Drug Administration (FDA). Author G. Caleb Alexander, MD, MS, from Johns Hopkins discusses this and more with JAMA Deputy Editor Joseph S. Ross, MD, MHS.

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Incidence rates of gastric cancer in younger individuals are on the rise and gastric cancer is the fifth-leading cause of cancer-related deaths worldwide. JAMA Review author Haeseong Park, MD, MPH, from the Dana Farber Cancer Institute, discusses this and more with JAMA Senior Editor Karen Lasser, MD, MPH.

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• Gastric Cancer